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# CaSO4

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# CaSO4

186 results

1. ## AP Chemistry

Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium

2. ## CHEM 1411

A 0.4550g solid mixture containing CaSO4 dissolved in water and treated with an excess of Ba(NO3)2, resulting in precipitation of 0.6168g of BaSO4. What is the concentration ( weight percent) of CaSO4 in the mixture?

3. ## Chemsitry

At 25 °C, only 1.9 g CaSO4 (MM = 136 g/mol) will dissolve in 2.00 L of water. Write the equilibrium expression and calculate the equilibrium constant for the reaction below. CaSO4 (s) ⇋ Ca2+ (aq) + SO42- (aq)

4. ## Chemistry

A 2.914 gram sample of gypsum, a hydrated salt of calcium sulfat, CaSO4, is heated at a temperature greater than 170 degrees Celcius in a crucible until a constant mass is reached. The mass of the anhydrous CaSO4 salt is 2.304 grams. Calculate the percent

5. ## chemistry

you made up a standard solution of calcium sulfate (CaSO4). the temperature is 25C. you then add 5.00*10^-3 odium sulfate (Na2SO4). Calculate the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58.

6. ## Chem

You made up a saturated solution of calcium sulfate (CaSO4). The temp is 25 degrees Celsius. You then add 5.00*10^-3 of sodium sulfate (NaSO4). What are the concentrations of calcium and sulfate after equilibrium is reached? The pKs of CaSO4 is 4.58. I

7. ## SCIENCE/CHEM

when the following equation is balanced , what is the sum of the co-efficients? AL2(SO4)^3+Ca(OH)2–>Al(OH)3+CaSO4

8. ## chemistry

Which of the following salts is slightly soluble in water? A. AgCl B. CaSO4 C. Na2CO3 D. PbCl2?

9. ## chemistry

A water sample contains 102mg of CaSO4 per litre. Calculate the hardness in terms of CaCO3 equivalent.

10. ## chemistry

how many grams of calcium oxide are needed to produce 36.0 g of Hg. 4HgS +4CaO–> 4Hg +3CaS + CaSO4.

11. ## chemistry

do not understand this problem The Ksp of CaSO4 is 4.93× 10–5. Calculate the solubility (in g/L) of CaSO4(s) in 0.500 M Na2SO4(aq) at 25 °C.

12. ## CHEMISTRY

How many molecules of NH3 are produced from the reaction of 7 mols of Ca(OH)2 according to the following (NH4)2SO4+Ca(OH)2=NH3+CaSO4+H2O

13. ## Chemistry

Calcium sulfate is found in plaster. a) At 25 °C, Ksp for CaSO4 is 2.4 × 10-5. Determine the molar solubility in water and in 0.15 M CaCl2. b) Na2SO4 is added gradually to 100 cm3 of a solution that contains 0.15 M Ca2+ and 0.15 M Sr2+ ions (at 25 °C).

14. ## Chemistry

What is the precipitation of CaSO4 and Na2CO3 when mixed? What is the net ionic equation?

15. ## Chemistry

Below are the formulas of some hydrates. what is the mole ratio of salt to water? Hydrate Na2SO4.10H2O Co(NO3)2.6H2O Mo(NO3)2.5H2O CaSO4.2H2O (CaSO4)2.H2) Thankk you

16. ## Chemistry

what is the gram formula mass of CaSO4*2H20?

17. ## chemistry

if you heat 15.00g of the hydrate CaSO4*2H20, and drive off the water, what is the weight of the anhydrous salt remaining? How do I go about solving this?

18. ## chemistry

calcium nitrate + sulfuric acid =caso4+? write a balanced chemical equation for this reaction including states. Ca(NO3)2 + H2SO4 ==> CaSO4 + 2HNO3 You don’t have enough information to provide states. CaSO4 will be a solid so you write CaSO4(s). H2SO4 will

19. ## Chemistry

The Ksp of CaSO4 is 4.93× 10–5. Calculate the solubility (in g/L) of CaSO4(s) in 0.300 M Na2SO4(aq) at 25 °C

20. ## chem

How do you balance this equation?: (NH4)2SO4+Ca(OH)2==>CaSO4+NH3+H20 Thanks! 2 NH3 2H2O Others are ones. (NH)2SO4 + Ca(OH)2 –> CaSO4+2NH3+2H2O Thanks!

21. ## Chemistry

A 2.914-g sample of gypsum, a hydrated salt of calcium sulphate, CaSO4, is heated at a temperature greater than 170 °C in a crucible until a constant mass is reached. The mass of the anhydrous CaSO4 salt is 2.304 g. Calculate the % by mass of water in the

22. ## AP CHEM

19. Burning coal and oil in a power plant produces pollutants such as sulfur dioxide, SO2. The sulfur-containing compound can be removed from other waste gases, however, by the following reaction: 2 SO2(g) + 2 CaCO3(s) + O2(g)  2 CaSO4(s) + 2 CO2(g)

A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 salt is 1.577 g. Calculate the percent by mass of water in the hydrated

24. ## science

Na2SO4(aq)+CaI2(aq)→CaSO4(s)+2NaI(aq) as net ionic

25. ## Chemistry

How many grams of CaSO4 are present in 320ml of a 0.00810 M solution of this compound?

26. ## chemistry

Calculate the xolubility of calcium sulfate in 0.010 mol/L calcium nitrate at SATP CaSO4 ==> Ca^+2 + SO4^= Ca(NO2)2 ==> Ca^+2 + 2NO3^- = 0.01 M Ksp CaSO4 = (Ca^+2)(SO4^=) = ??. Look up Ksp for CaSO4. Subsitute 0.01 for Ca^+2 and x for SO4^= and solve for

27. ## Chemistry

1. Ca(OH)2(aq) + H3PO4(aq) à Ca3(PO4)2(aq) + H2O(l) a. If you have 13.7mol of Ca(OH)2, how many grams of H2O are produced? b. How many grams of H3PO4 are required to produce 102.3g Ca3(PO4)2? c. How many moles of Ca(OH)2 are needed to produce 82.9g of

28. ## Chemistry

Find the concentration of Ca2+, in equilibrium with CaSO4(s) and 0.035 M SO4-2.

29. ## chemistry

addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl

30. ## Chemistry

CaSO4.2H2O ==> CaSO4 + 2H2O moles CaSO4.2H2O = 15.00 g x (1 mole CaSO4.2H2O/172.172) = 0.08712 moles. moles CaSO4 = same. grams CaSO4 = moles CaSO4 x molar mass CaSO4 = ?? Wait,.. how do I know the moles CaSO4? do I do .08712* CaSO4’s gfm?

31. ## Chem

The solubility of calcium sulfate is1.90g of caso4 per liter of aquences solution at 25c. The formula weight of caso4 is 136.11 calculate the solubility product of caso4.

32. ## Chemistry

Consider the reaction CaSO4(s)rightleftharpoons Ca^2+(aq)+ SO_4^2-(aq) At 25 C the equilibrium constant is Kc = 2.4 times 10^-5 for this reaction. If excess CaSO4(s) is mixed with water at 25C to produce a saturated solution of CaSO4, what are the

33. ## Solubility Chemistry helpp!

The Ksp of calcium sulfate, CaSO4, is 9.1 × 10−6. What is the molar concentration of CaSO4 in a saturated solution?

34. ## Chemistry

From the solubility product constants for CaF2 (fluorite) and CaSO4 (anhydrite) determine the equilibrium constant for the reaction CaF2 + SO4 2- –> CaSO4 + 2F-

35. ## sci/chemistry

when 1.87 g of gypsum(hydrated calcium sulfate) was heated to constant mass, it lost 0.39 g of water. What is the formula of gypsum? YOu know it is of the form: CaSO4.XH2O the idea here is to find x. calculate the number of moles of water in .39g.

36. ## Chemistry

What is the approximate ratio of the solubility of CaSO4 (Ksp = 2.4 x 10−5) in pure water to the solubility of CaSO4 in 0.10 M Na2SO4 at the same temperature?

37. ## chemistry

Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate Delta fS° for CaSO4·H2O(s) in J·mol-1·K-1. CompoundS °, J·mol-1·K-1 C(s) 5.69 H2(g) 130.6 N2(g) 191.5 O2(g) 205.0 Na(s) 51.0 Cl2(g) 223.0 Ca(s) 154.8 S(s) 31.8

38. ## chemistry – Can you please test

Calculate the amount (g) of each of the following salts that need to be added to a 200 mL volumetric flask to produce a 2 M solution of S. CaSO4 (NH4)2SO4 Fe2(SO4)3 Dr. BOB222, Could you please test the following? Thank you. CaSO4: moles x atomic mass =

39. ## Chemisty-Dr.Bob222

Determine the minimum concentration of the precipitating agent on the right to cause precipitation of the cation from the solutions to the left. a. 0.035 M BaNO3; NaF b. 0.085 M CaI2 ; K2SO4 c. 0.0018 M AgNO3 ; RbCl My work: Are my answers correct? a.

40. ## Chemistry

calculate the percent water in CaSO4*2H20 20.9%?

41. ## chemistry

Determine ΔSuniv for the following equation: Ca2+ (aq) + SO42- (aq) → CaSO4 (s)

42. ## chemistry

balance this stoichiometric equation: SO2 + CaCO3 + O2 ——> CaSO4 + CO2

43. ## Chemistry

I got 4.9*10^-3 M. Thanks and If the resulting solution has a volume of 1.9L , what is the minimum mass of CaSO4 (s) needed to achieve equilibrium?

44. ## chemistry

a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?

45. ## chemistry

∆H of ★Ca(HCO3)2→CaCO3 + CO2 + H2O and ★Ca(HSO4)2→ CaSO4+ SO2 + H2O???

46. ## Chemistry 12

The molar solubility of calcium sulphate CaSo4 is 8.43 x 10-3(10 to the power of negative 3) M. Calculate the mass of solid CaSo4 which can be evaporated from 250.0 mL of a saturated solution of CaSO4.

47. ## Chemistry

Would your calculated Ksp value be greater, less, or the same, if the following occurred, please explain your reasoning. a. The CaSO4 was not saturated b. You accurately measured 20.00 mL instead of 25.00 mL using a pipet c. The CaSO4 solution contained

48. ## Chemistry

I was wondering if you could help me with this problem. If the reaction proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.34 kg SO2 reacts with an exfess of CaCO3 and O2? Thanks for your help. Write the equation for the reaction

49. ## chemistry

Consider the following reaction CaCl2(aq) + 2Ag2SO4(aq) ! CaSO4(?) + 2AgCl(?) .Which of the following statements is true? 1. Both CaSO4 and AgCl will precipitate from solution. 2. Neither CaSO4 nor AgCl will precipitate from solution. 3. CaSO4 will

50. ## Chemistry

Consider the following reaction. CaSO4(s) reverse reaction arrow Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4×10^-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what

51. ## chemistry

calculate the # of oxygen atoms in 30 grams of CaSO4 #O atoms= 4 times the moles of CaSO4 * avagradoo’s number. How many moles of CaSO4 is in 30 g? there is 0.22 mol in 30 grams of CaS)4

52. ## Chemistry

The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution

53. ## chemistry

Given the following solubility constants, which list arranges the solutes in order of increasing solubility? CaCO3: Ksp = 2.8 × 10-9 Ca(OH)2: Ksp = 5.5 × 10-6 CaSO4: Ksp = 9.1 × 10-6 CaF2: Ksp = 5.3 × 10-9 A. CaSO4 < Ca(OH)2 < CaCO3 < CaF2 B. CaSO4 <

54. ## chemistry

how to find the mole ratio of salt to water of Mo(NO3)2.5H2O CaSO4.2H2O (CaSO4)2.H2O

55. ## chemistry

Ksp fo CaSO4 is 6.1*10?-5. how many grams of CaCl2 must be added to 500ml of 0.010M H2SO4 to just start preciptation of CaSO4? I cant figure this out at all.

56. ## Chemistry- HELP

Can someone please help me? Are these questions correct…if not any suggestions would be greatly appreciated! 1. What salt forms as the result of a mixture of calcium hydroxide and hydrochloric acid? a. CaCl b. CaHCl c. CaCl2 d. CaOH e. Cl(OH)2 I believe

57. ## college chemistry

If 100.0 mL of 0.0025 M Na2SO4 (aq)is saturated with CaSO4 how many grams of CaSO4 would be present in the solution? [Hint: Does the usual simplifying assumption hold?]

58. ## chemistry

I have tried virtually everything, i can’t fogure out this problem. I have 2K^+ + SO4^2- + Ca^2+ + 2I^- –> CaSO4(s) + 2K^+ + 2I^-. but it is incorrect and i dnt see how, can u help me? Write balanced complete ionic equation for K2SO4 (aq) + CaI2 (aq)CaSO4

59. ## chem

a 2.50g sample of hydrate of calcium sulfate losses 0.523g of water when heated. what is the mass percent of water in the hydrate and the formula for the hydrate difference of the two masses divided by the initial mass. I believe Adam should reconsider his

60. ## chemistry

If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.97 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)

If the reaction below proceeds with a 96.8% yield, how many kilograms of CaSO4 are formed when 5.27 kg SO2 reacts with an excess of CaCO3 and O2? 2 CaCO3(s) + 2 SO2(g) + O2(g) 2 CaSO4(g) + 2 CO2(g)

62. ## chemistry

Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1. Compound S °, J·mol-1·K-1 C(s) 5.69 H2(g) 130.6 N2(g) 191.5 O2(g) 205.0 Na(s) 51.0 Cl2(g) 223.0 Ca(s) 154.8 S(s) 31.8 Anyone

63. ## chemistry

Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1. CompoundS °, J·mol-1·K-1 C(s) 5.69 H2(g) 130.6 N2(g) 191.5 O2(g) 205.0 Na(s) 51.0 Cl2(g) 223.0 Ca(s) 154.8 S(s) 31.8 somebody

64. ## chemistry

Using data in table below and S °(CaSO4·H2O(s))= 194.0 J·mol-1·K-1, calculate ÄfS° for CaSO4·H2O(s) in J·mol-1·K-1.

65. ## Chemistry

What would be the effect on Ksp if an unsaturated solution of CaSO4 was titrated instead of a saturated solution of CaSO4. would ksp be higher, lower or the same? would ksp be higher due to the more ions available in the solution. so you would have to use

66. ## chemistry

Given the following reaction: Pd(NO3)2+CaSO4–>PdSO4+Ca(NO3)2 If you started with 225.6ml of 6.32M CaSO4 and the percent yield of this reaction was ol 78.2%, what is the actual yield of grams mod of PdSO4?

67. ## Chemistry

Please help me….are these questions right or no? If not can you help me…any suggestions please? 7.(14). Which of the following is a salt? a. HNO3 b. H2SO4 c. CaSO4 d. NaOH e. NH3 I put down C- CaSO4, is that right or am I way off track? 8.(15). Which

68. ## chemistry

A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate

69. ## Chemistry

A mixture of salt way in 13.78g contains CACO3 with gaseous impurity it was heated to a constant mass and the resolve was reacted with H2SO4 to form 6.78g of CASO4. Calculate the percentage purity of the calcium trizoncarbonate four I’m the mixture (ca=40,

70. ## chemistry

the Ksp of CaSO4 is

71. ## Chem

What is molar mass of CaSO4?

72. ## College Chemistry

Which contains more sulfur, 35.2g CaSO4 or 35.7g NaSO4?

73. ## chemistry

How many moles are in 52.3 grams of CaSO4?

74. ## chemistry/ quantitative analysis

How many grams of CaSo4 will dissolve in 6L of water?

75. ## chemistry/ quantitative analysis

How many grams of CaSo4 will dissolve in 6L of water?

76. ## chemistry

mole ratio of CaSO4.2H2O

77. ## chemistry

mole ratio of (CaSO4)2.H2O

78. ## Analytical chemistry

Describe the preparation of 2litres of 0.15M CaSO4

79. ## Chemistry

Hydrated capper (ll) tetra oxasulphate (vi) caso4 .5h20

80. ## chemistry

how do you balance this equation K2SO4 + Ca(NO3)2 -> CaSO4 + KNO3

81. ## Chemistry

What physical properties will the ionic compound CaSO4 be expected to have?

82. ## science

aranging these compounds deceding caco3 caso4 Nacl Mgcl

83. ## Chemistry

A hardwater sample contains 68g of CaSO4 in 10litre. Calculate the hardness.

84. ## chemistry

How many moles of H2SO4 are required to produce 100kg of CaSO4 from CaCO3

85. ## Chemistry

How do I calculate the molar mass of the following: Na2SO4.10 H2O(s) CaSO4.2H2O(s)

86. ## Chemistry

I was asked to consider the solubility for hydrated calcium sulfate in HCl. The principal acid my proffesor had posted for the solution was [ CaSO4(hyrdrated) + HCl H30^+ + Ca^2+ + SO4^2- ]. I guess what I’m asking is what happened to the Cl^- and why

87. ## chemistry

If 380. mL of 0.4294 M aqueous CaBr2 and 250. mL of 0.5880 M aqueous SO42- are reacted stoichiometrically according to the equation, how many mol of CaBr2 remained? Al2(SO4)3(aq) + 3 CaBr2(aq) → 2 AlBr3(aq) + 3 CaSO4(s)

88. ## chemistry

the order of cation concentration of CuSO4, BaSO4, CaSO4 from highest to lowest.

89. ## chemistry

What is the gram fomula mass of calcium carbonate (CaSO4)? A. 6 g B. 136.2 g C. 230.0 g D. 235.4 g think B

90. ## Chemistry

Balance this equation: [?]Na²SO⁴(aq) + [?]CaCl²(aq) -> [?]CaSO⁴(s) + [?] NaCl(aq) I don’t understand chemistry at all :((((

91. ## science

when marble undergoes CaCO3+ H2SO4 = CaSO4+H2O+CO2, what happens to it and where can one see the evidence of this effect?

92. ## Chemistry

How do I calculate the amounts of Na2SO4 and CaCl2 that I need to create a solution of CaSO4 at 9 grams/Liter concentration?

93. ## Chemistry

How can I tell if the following equations produce precipitates or not? 1. HgCl2 (aq) + K2CrO4 (aq) ==> 2. Ba(OH)2 (aq) + NaClO3 (aq) ==> 3. ZnI2 (aq) + CaSO4 (aq) ==> 4. SnCl2 (aq) + MgBr2 (aq) ==>

94. ## Science, Chenistry

If you have a tank containing 10,000L of water. what weight of CaSO4.H2O must be added to math the Ca+ concentration of 130ppm

95. ## chemistry

At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)

96. ## chemistry

a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?

97. ## chemistry

which of the following would form acidic,basic or neutral solutions:nh4f,nh4cn,nh4ch3coo,nh4cl,ba(ch3coo)2,nacn,caso4,cr(no3)3,fecl3,na2co3

98. ## chem

In the equation ca +H2SO4->CaSO4 +H2. How many grams of calcium will react with 0.76 mols of H2SO4?

99. ## Chemistry

Will a precipitate of CaSO4 form if 40.0mL of 2.0 x 10^3M CaCl2 is mixed with 60.0mL of 3.0 x 10^-2 Na2SO4?

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