Question

calculate the mass (g) of sodium sulfate needed to prepare 100.0ml of solution .

a)Type the calculation performed to determine the mass of sodium sulfate necessary to prepare the 0.028 M stock solution. Report the final answer to appropriate number of significant figures.

b)Report the actual mass of sodium sulfate used to prepare the 0.028 M stock solution. Type the calculation performed to determine the actual concentration of the 0.028 M stock solution. Report the final answer to appropriate number of significant figures.

Answer #1

Measured Mass of NaCl 5.84g
Measured Volume of Water 100.0mL
1. Answer each question with correct significant figures
and units. You must show calculations for determining each
quantity. If necessary, use the molar mass of NaCl = 58.44
g/mol.
a. Determine the number of moles of NaCl in the solution.
b. Determine the number of moles of all solutes (both cations
and anions) from the number of moles of NaCl that you determined
above. For this question, in addition to...

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http://chemresources.chemistry.dal.ca/firstyear/acid_base.html

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calculation the actual mass and concentration for the
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Express your answer to three significant figures and include the
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Calculate the mass percent (m/m) of a solution prepared by
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Express your answer to four significant figures.
Part B
Vinegar is a solution of acetic acid in water. If a 185 mL bottle
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Express your answer to three significant figures.
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common methods to prepare a buffer.
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benzoic acid is 4.2

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