by your instructor. Calculations 4. Calculate the mass of the hydrate (2 - 1) 5 Calculate the mass of the anhydrate after heating (3- 1) 6 Calculate the mass of water lost from the hydrate sample (4-5) 7. Calculate the percent H20 in the hydrate by dividing the moon

Introductory Chemistry: A Foundation
9th Edition
ISBN:9781337399425
Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter15: Solutions
Section: Chapter Questions
Problem 87QAP: 87. What volume of 0.151 N NaOH is required to neutralize 24.2 mL of 0.125 N H2SO4? What volume of...
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1. Mass of crucible is 23.43 2. Mass of crucible and hydrate is 29.24 3.Mass of crucible and anhydrate 26.31 3a. Mass of crucible and anhydrate second heading 26.28
by your instructor.
Calculations
4 Calculate the mass of the hydrate (2 - 1)
5. Calculate the mass of the anhydrate after heating (3- 1)
6. Calculate the mass of water lost from the hydrate sample (4-5)
7. Calculate the percent H2O in the hydrate by dividing the mass of H,O lost (6) by the mass of the
hydrate (4) and multiply by 100%.
Percent water in hydrate
g water
x100%
%3D
g hydrate
8. Calculate the moles of H2O in the hydrate by dividing the mass of the H,O (6) by its molar mass.
Moles of water = g water x
1 mole water
%3D
18.02 g water
9. Calculate the moles of anhydrate by dividing the mass of the anhydrate by its molar mass.
1 mole anhydrate
120.4 g anhydrate
Moles of anhydrate = g anhydrate x-
%3D
10. To determine the ratio of moles of water to 1 mole of anhydrate, divide the moles of water (8) by
the moles of anhydrate (9). Round off the value for moles of H,0 to the nearest whole number.
moles of water
moles of H,O
moles of MgS04
1 mole of MgSO4
11. Complete the formula of the hydrate by writing in the number of moles of water for each mole of
anhydrate.
Transcribed Image Text:by your instructor. Calculations 4 Calculate the mass of the hydrate (2 - 1) 5. Calculate the mass of the anhydrate after heating (3- 1) 6. Calculate the mass of water lost from the hydrate sample (4-5) 7. Calculate the percent H2O in the hydrate by dividing the mass of H,O lost (6) by the mass of the hydrate (4) and multiply by 100%. Percent water in hydrate g water x100% %3D g hydrate 8. Calculate the moles of H2O in the hydrate by dividing the mass of the H,O (6) by its molar mass. Moles of water = g water x 1 mole water %3D 18.02 g water 9. Calculate the moles of anhydrate by dividing the mass of the anhydrate by its molar mass. 1 mole anhydrate 120.4 g anhydrate Moles of anhydrate = g anhydrate x- %3D 10. To determine the ratio of moles of water to 1 mole of anhydrate, divide the moles of water (8) by the moles of anhydrate (9). Round off the value for moles of H,0 to the nearest whole number. moles of water moles of H,O moles of MgS04 1 mole of MgSO4 11. Complete the formula of the hydrate by writing in the number of moles of water for each mole of anhydrate.
7. Percent water
(Show calculations.)
8. Moles of water
(Show calculations.)
moles
9. Moles of salt (anhydrate)
(Show calculations.)
moles
10. Ratio of moles of water to moles of hydrate
(Show calculations.)
11. Formula of hydrate
MgSO4 •
H,O
Questions and Problems
Q5 Using the formula you obtained in B11, write a balanced equation for the dehy-
dration of the MgSO, hydrate used in the experiment.
Transcribed Image Text:7. Percent water (Show calculations.) 8. Moles of water (Show calculations.) moles 9. Moles of salt (anhydrate) (Show calculations.) moles 10. Ratio of moles of water to moles of hydrate (Show calculations.) 11. Formula of hydrate MgSO4 • H,O Questions and Problems Q5 Using the formula you obtained in B11, write a balanced equation for the dehy- dration of the MgSO, hydrate used in the experiment.
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