# A hydrate of strontium choloride contains 40.54% water. What is the formula of the hydrate ? SrCl2*xH2O. H2O = 40.54% SrCl2 = 100 - 40.54 = 59.46% Take 100 g sample. This gives us 59.46g SrCl2 and 40.54g H2O. Convert

41,338 results
1. ## Chemistry

A hydrate of copper (II) sulfate with formula CuSO4.xH2O has a molar mass of 250.0 g/mol. 2.545 g of hydrate is heated and 63.85% of the residue is found after heating. a) Determine the value of x in the formula of the compound b) What is the molecular

2. ## CHEMISTRY

Do you think it is more useful to have the percent by mass of water in hydrate or the percentage composition, assuming that you know the formula for the associated dehydrated compound? Can someone please explain what's the meaning of this question, I'm

3. ## Chemistry

A 5 gram sample of a hydrate of BaCL2 was heated, and only 4.3g of the anhydrous salt remained. What percentage of water was in the hydrate?

4. ## chemistry

What is the percentage of water in the hydrate CoCl2 • 6H2O? Show work I'm confused whether it's 52.17% or 45%

5. ## chemistry

suppose you heat a hydrate too quickly and some of it was lost as it spattered out of the container. Explain how this would affect the calculated percent of mass and the chmical formula

6. ## Chemistry

A hydrate of zinc nitrate has the formula Zn(NO3)2 . xH2O. If the mass of 1 mol of anhydrous zinc nitrate is 63.67% of the mass of 1 mol of the hydrate, what is the value of x?

7. ## Chemistry

Chromium (II) nitrate forms a hydrate that is 40.50% water by mass. What is its chemical formula? I just need to figure out how to do it!

8. ## chemistry

suppose the hydrate was heated too quickly and some of it was lost as it spattered out of the container . explain how this would effect . a. the calculated mass of water in the compound b. the molecular formula you determined.

9. ## chemistry

A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed and found to have a mass of 160 grams. What is the formula for the hydrate? CuSO4 * 10 H2O CuSO4 * 7 H2O CuSO4 * 5 H2O CuSO4 * 2

10. ## chemistry

what is the meaning of the numeral represented by X in the general formula for hydrate salt * XH2O

11. ## chemistry

Magnesium carbonate (MgCO3) is a hydrate. If you start with 15.67 g of the hydrate and after heating you get 7.58 g, what is the formula of the hydrate? I'm having a lot of trouble on this one.

12. ## chemistry

Why is it necessary to heat the hydrate gently at first and then more strongly only after most of the water has been driven off?

13. ## chemistry

this is for a lab - determining the chemical formula of a hydrate. suppose the hydrate was heated too quickly and some of it was lost of spattered out of the container. explain how hthis would effect a) the calculated percent by mass of water in the

14. ## Chemistry

Washing soda is a hydrate of sodium carbonate. Its formula is Na2CO3 X xH20. A 2.714 g sample of washing soda is heated until a constant mass of 1.006 of Na2CO3 is reached. What is x? What is the experimental mass percent of water in the hydrate?

15. ## chemistry

In hydrated copper sulfate, the chemical formula is CuSO4.5H2O, while that of hydrated cobalt(II) chloride is CoCl2.6H2O. I want to ask how to determine the number of moles of water is needed to hydrate any salt. Is there a pattern or formula?

16. ## chemistry

A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?

17. ## chemistry

a 5.00g sample of a hydrate of barium chloride was heated, and only 4.30g of the anhydrous salt remained. what is the formula of the hydrate?

18. ## Chemistry

A sealed flask contains 1 mole of hydrogen and 3 moles of helium gas at 20DC. If the total pressure is 40kPa, what is the partial pressure of the Hydrogen gas? AND :) The data below was obtained by a student in order to determine the percent of water in a

19. ## Chemistry

on heating the hydrate CaSO4*2H2O, how many moles of water should be driven off per mole of hydrate? 1 mole?

20. ## Chemistry

What is the variable x in the following hydrate formula NaCl xH2O if the mass of sodium chloride is 58g and the mass of the water is 36g

21. ## Chemistry

The aluminium sulphate hydrate contains 8.10 percent Al by mass. Calculate x, that is, the number of water molecules associated with each unit

22. ## chemistry

Help me conclude my lab experiment on formula of a hydrate.with the aim of determine the number of molecules of water associated with a hydrated inorganic salt

23. ## chemistry

A 6.25 gram sample of copper(II) chloride hydrate was heated until all the water was liberated. The residue massed 4.45 grams. How many water molecules are present for every formula unit of copper(II) chloride?

24. ## science

(1) A sample of the hydrate CuSO4.5H2O has a mass of 12.5g. (a) how many molecules of hydrogen are contained in this hydrate? If the hydrate is completely dehydrated.

25. ## Chemistry

Predict the effect of each of the following by mass of water in the hydrate and the chemical of the hydrate? a) not heating the hydrate enough b) overheating the hydrate and producing some copper (ii) oxide C) the initial hydrate appears to weigh less than

26. ## chemistry

A 2.50g sample of a hydrate of calcium nitrate was heated, and only 1.70g of the anhydrous salt remained. what is the formula of the hydrate?

27. ## Chemistry

A sample of CuSO4*5H2O was heated to 110 degrees C, where it lost water and gave another hydrate of copper (II) ion that contains 32.50% Cu. A 98.77-mg sample of this new hydrate gave 116.66 mg or barium sulfate precipitate when treated with barium nitrate

28. ## Chemistry

Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO4⋅xH2O, where x indicates the number of

29. ## chemistry

Calculate the following: (a) mass of water in the hydrate sample (g): (b) number of moles of water in the sample: (c) mass of pure salt in the sample (g): (d) number of moles of salt in the sample: (e) molar ratio of water to salt in the sample: If the

Okay I've got a HUGE chem test tomorrow and I desperately need help! Please help!!!! 73. Hematite (Fe2O3) and magnetite (Fe3O4) are two ores used as sources of iron. Which ore provides the greatest percentage of iron per kilogram? 78. A hydrate contains

31. ## Chloral Hydrate

What is the molar mass of chloral hydrate and how many moles of C2H3Cl3O2 molecules are in 500 g chloral hydrate. Also, what is the mass in grams of 2.0 x 10^-2 mol chloral hydrate? Molar mass? You can add them up. Starting at the left, 2 carbons, three H,

32. ## science

A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?

calculate the mass of the water of hydration if a hydrate loses 0.025 mol of H2O when heated

34. ## Science

What effect would letting a crucible and its contents dry overnight before finding their mass have on the value for the percent water in a hydrate?

35. ## chemistry

A 2.50 g sample of a hydrate of calcium sulphate losses 0.523 g of water when heated. Determine the mass percent of water in the hydrate and the formula of the hydrate.

36. ## chemistry

A 2.500 gram sample of hydrate of calcium sulfate loses 0.532 grams of water when heated. Determine the mass percent of water in the hydrate and the formula of the hydrate.

37. ## chemistry

Cobalt(2) chloride is commonly obtained from chemical supply houses as a hydrate with the formula COCL2*6H2O an analysis showed that 25.0 g of this hydrate contains 11.3 g of water what is the percent water by weight in this hydrate?'

38. ## CHEM

I don't understand how to find the formula of a hydrate. Here's one of the question. if you guide me through it I think I'll be able to do the rest of them. Thanks :) When 100g of ZnSO4xœH2O is heated, 43.86g of water is given off. Calculate the formula

39. ## Chemistry

7. A student conducts an experiment on a different hydrate. The empty crucible is heated to a constant mass of 24.330. A sample of the unidentified hydrate is placed in the crucible, and the total mass is 31.571 g. The crucible and hydrate are heated to

40. ## chemistry

When 3.761g of a hydrate of strontium chloride is heated to 60 degree C it forms strontium chloride dihydrate of mass 2.746g What is the formula of the original sample?

41. ## Chemistry

After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the formula?

42. ## Chemistry

When separated from a water solution, CuSO4 forms a hydrate with 5 water molecules per formula unit. If 37 g of anhydrous CuSO4 are dissolved in water, what mass of the hydrate could be recovered from the solution?

43. ## Chemistry

What percent by mass does the water constitute in Na2SO4*10H2O? Determine the formula for the hydrate of cobalt (II) acetate from the following data. Mass of crucible and lid= 28.945g Mass of crucible, lid, and hydrate= 29.986g Mass of crucuble, lid, and

44. ## Chemistry

A 25 g sample of a hydrate of Ca(NO3)2 was heated, and only 1.7 g of the anhydrous salt remained. What hydrate of Ca(NO3)2 was tested?

45. ## Chemistry

An unknown hydrate of copper (II) oxalate is to be identified in the lab. The following data was collected by a student: Mass of crucible 23.776 g Mass of crucible + hydrate 24.889 g Mass of crucible + anhydrate 24.530 g Thank you

46. ## chemistry

What is the general formula for a hydrate?

47. ## chemistry 11

Hi, I am stuck on a couple questions in chemistry 11. The questions are 1. Calculate the number of moles of the anhydrous salt left behind 2. Calculate the number of moles of water removed by heat from your sample of hydrate. 3. Calculate the moles of

48. ## Chemistry

I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number

49. ## Chemistry :/

Experiment 1 results: mass of crucible 88g mass of hydrate 93g mass of salt 91.196g 1. Calculate the following: a:mass of water in the hydrate sample (g) b:number of moles of water in the sample c:mass of pure salt in the sample (g) d:number of moles of

50. ## CHEMESTRY

a student heats 2.005 g of a copper bromide hydrate of unknown molecular formula, completely driving off the water of hydration, and notices that the weight drops to 0.998g. Upon reduction with excess aluminum metal, the copper ions are reduced to 0.442 g

51. ## chemistry

Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure. The formula for Epsom salts can be written as MgSO4 · x H2O, where x indicates the number

52. ## Chemistry

14.1g of hydrated zinc sulphate was heated. 0.52moles of water was driven off. What is the hydrate formula?

53. ## Chemistry

1.984 g of a hydrate of K2CO3 is dissolved in 250. mLs of H2O. 10.0 mLs of this solution is tirade against 0.100 M HCl, producing the following results. Flask 1 - Initial 0, final 9.2 Flask 2 - Initial 9.2, final 18.3 Flask 3 - initial 18.3, final 27.8

54. ## science

What is the variable x in the following hydrate formula NaCl xH2O if the mass of sodium chloride is 58g and the mass of the water is 36g

55. ## CHEMISTRY

WHAT IS THE MEANING OF THE NUMERICAL REPRESENTED BY X IN THE GENERAL FORMULA FOR HYDRATE; SALT H2O?

56. ## Chemistry

cobalt(11)chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl2*6H2O. An analysis showed that 25.0g of this hydrate contains 11.3g of water.What is the percent water by weight in this hydrate?

57. ## Chemistry

Cobalt(II) chloride is commonly obtained from chemical supply houses as a hydrate with the formula CoCl2 • 6 H2O. An analysis showed that 25.0 g of this hydrate contains 11.3 g of water. What is the percent water by weight in this hydrate? Show all your

58. ## chemistry

A hydrate of strontium choloride contains 40.54% water. What is the formula of the hydrate ? SrCl2*xH2O. H2O = 40.54% SrCl2 = 100 - 40.54 = 59.46% Take 100 g sample. This gives us 59.46g SrCl2 and 40.54g H2O. Convert to mols. mols SrCl2 = 59.46/158.5 =

59. ## Chemistry

A 32.907-g sample of a hydrate of Au (CN)3 contains 5.406 g H2O What is the formula for the hydrate? What is the percent water in this compound? What mass of this hydrate contains 100.0 g H2O?

60. ## Chemistry

During your experiment, you are drive water from the hydrate MxXy*zH2O. You subsequently determine that your hydrate has six molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with only four

61. ## chemistry

If 4.02 grams of a hydrate of magnesium sulfate loses 2.06 grams of water when heated, what is the formula for the hydrate

62. ## science

I did a hydrate lab in school and these were my results and at the end we have to write the correc formula for the hydrate but I know the answer at the end is supposed to be 5H2O so why do I keep getting 4H2O? Can someone double check my work Mass of

63. ## Chemistry

I don't understand these two questions. Any help on how to figure this would be great. Thanks. 1. Write the equation for the decomposition of the hydrate, MgC*XH₂O 2. Write the equation for the decomposition of the hydrate, CuSO₄*XH₂O.

64. ## Chemistry

What is the percentage composition of water in a sample of SrS2O3 plus 5 H2O? (this is a hydrate)

65. ## science

an ionic compound that attracts atmospheric water that a hydrate is found is said to be non-volatile . is this statement is correct or not???

66. ## Chemistry

During your experiment, you are drive water from the hydrate M x X y ⋅zH 2 O . You subsequently determine that your hydrate has four molecules of waters associated with each formula unit. However, the bottle the hydrate came from indicated a formula with

67. ## chemistry

In the experiment, a hydrate is heated to form an anhydrate. The masses of the before and after are measured and the percent of the water in the hydrate is calculated. If some of the hydrate spatters out of the crucible and isnt noticed, how will this

68. ## 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

69. ## chemistry

I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number

70. ## Chemistry

Experiment 1 results: mass of crucible 88g mass of hydrate 93g mass of salt 91.196g 1. Calculate the following: a:mass of water in the hydrate sample (g) b:number of moles of water in the sample c:mass of pure salt in the sample (g) d:number of moles of

71. ## chemestry

1.0000 g of hydrate of stannic chloride with unknown formula is heated to 100C (celsius) for 30 minutes. The remaining anhydrous salt weighted 0.7836g. What is the formula of this hydrate? thanks

72. ## Chemistry

After 0.6523g of CoCL2 .6H2O is heated, the residue has a mass of 0.3423g. Calculate the percent H2O in the hydrate. What is the formula of the hydrate

73. ## chemistry

what is the formula for hydrate copper(II) CHLOride Tetra-hydrate?

74. ## chem

A 3.48 gram sample of sodium sulfate hydrate lost 1.35 gram of water when heated to constant weight. What is the formula of the hydrate? this is what I did, but I am stuck. Na2SO4 . H2O------> NA2SO4+H20

A hydrate of barium chloride has the formula BaCl subscript 2 dot XH subscript 2 O.If a 1.055g sample of the hydrate contains 0.157g H2O, what is the "X" in the formula?

76. ## chemistry

What is the actual hydrate formula for Barium Chloride? I did a lab and got 5.4 but i was told to find the actual formula online. Same for MgSO4.. i got 7.74 but i need to find the actualy hydrate formula aswell

77. ## chemestry

a student heats 2.005 g of a copper bromide hydrate of unknown molecular formula, completely driving off the water of hydration, and notices that the weight drops to 0.998g. Upon reduction with excess aluminum metal, the copper ions are reduced to 0.442 g

78. ## CHEM

A sample of an unknown hydrate weighs 0.500 g and after heating it weighs 0.100. What is the percent of water in the hydrate?

79. ## chemistry

If 4.36g of a hydrate of the salt baCl2 is heated and in the process losses 0.6431g of mass, show all your work to calculate the amount of water X in the hydrate, BaCl2.XH2O

80. ## chemistry

if 4.36g of a hydrate of the salt baCl2 is heated and in the process losses 0.6431g of mass, show all your work to calculate the amount of water X in the hydrate, BaCl2.XH2O

81. ## chemistry

What happens when you have a mixture of CO2 hydrate and methane hydrate when the temperature is 2.5 C and the pressure is 2 MPa. Does the methane come off and the CO2 hydrate remain

82. ## chemistry

you heat 4.31 grams of a nickel 2 phosphate hydrate. You heat to a constant mass of 3.09 grams. What is the formula of this hydrate?

83. ## Chemistry

A student recorded the following data for copper sulfate pentahydrate. Weight of crucible and cover (after heating to constant weight), 28.120g Weight of covered crucible plus sample, 31.020g Weight of covered crucible plus sample after heating to constant

84. ## Chemistry

Hi I need with with a prelab calculation for a Hydrate Crystal lab and I am so confused @_@ You don't really need to solve it if you don't want to, I just need an example on how to do these problems 1) Find the mass of the water that evaporated upon

85. ## Chemistry

Clathrate hydrate research is done by Professor Ken Janda here at UC Irvine. Look up clathrate hydrate with a general search of the internet and at Professor Janda's Research. Look at text and structures posted on the Gas Hydrate Home and the Clathrate

86. ## chemistry

what is the general formula for a hydrate?

87. ## Chemistry

An unknown salt AS x XH2O was analyzed and found to contain 16.4 percent water. If the anhydrous salt has a formula mass of 183 amu, find the water of crystallization (X) for the hydrate. I have no idea how to figure this out! HELPP PLEASE!!

88. ## CHEM

A 7.5 g sample of Cu(NO3)2.nH2O is heated. After the water has been driven off, 5.8 g of Cu(NO3)2 remains. What is the value of n in the empirical formula of this hydrate?

89. ## chemistry

how do you calculate the empirical formula of the barium hydroxide hydrate if a sample consists of 3.70 grams of barium hydroxide and 2.64 gras of water???

90. ## chemistry

empirical formula of a barium hydroxide hydrate if a sample consists of 3.70 g of barium hydroxide and 2.64 g water.

91. ## stoichiometry

2. A feed ingredient gave the following percentage analysis moisture (16.0%), protein (18.0%), and fibers and minerals (66.0). If the moisture content were to be reduced by drying material in order to bring up the protein to 20.0%, what should be the final

92. ## Chemistry

Hi how do I find out what the chemical formula of the unknown copper hydrate is if I have the numbers: 0.007 moles of water, 0.002 moles of copper, and 0.006 moles of chloride?

93. ## science

what is the difference between water on the surfaace of crystals and hydrate water itself?

94. ## chemistry

ok im not sure how to do this 15.00ml of acetic acid is pipetted into a flask 0.35 grams of sodium acetate trihydrate is added and mixed then 0.75 of the hydrate is added 1)i assumed that the volume(s) are additions. 15.00ml x .35g *m/1.45g and for the

95. ## CHEMISTRY

When 6.724 g of one of the hydrates of sodium sulfate (Na2SO4) was heated to drive off its water of hydration, the residue of anhydrous sodium sulfate has a mass of 2.964 g. What is the value of x in the formula for the hydrate, Na2SO4•xH2O?

96. ## chemistry

A chemist heats a sample of copper(II) sulfate and finds that 63.9% of the mass is copper(II) sulfate and the other 36.1% by mass is the water. What is the formula of the hydrate?

97. ## natural product 2

: Chloral hydrate solution is prepared by dissolving ____gms of solid chloral hydrate in 20ml water

98. ## Chemistry

Upon heating 8.5g sample of Sodium Sulfate hydrate, it loses 4.776 grams after heating. What steps are necessary for me to find the n for the hydrate? GIVEN: Na2SO4 - n H2O the molar mass of sodium sulfate is 142.05g/mol

99. ## Chemistry

Describe how you could find the % by mass of water in the hydrate CuSO4Ÿ5H2O assuming that you did not already know the formula. Be specific and list the laboratory procedural steps you would take in the order that you would perform them.

100. ## chemistry

what is the formula for the sodium sulfate if 3.54g of dry solid remain after 8.50g of hydrate are heated??