MTY1103 ANALYTICAL CHEMISTRY - LABORATORYPROBLEM SET 1I. SOLUTIONS1. Typical seawater contains 2.7g of salt (sodium chloride, NaCl) per 100mL. What is the molarity ofNacl in the ocean?2. Copper (II) sulfate pentahydrate, CuSO, 5 H20, has 5 moles of H20 for each mole of CuSO, inthe solid crystal. The formula mass of CuSO4 • 5 H20 is 249.68 g/mol. How many grams of CuSO4• 5 H20 should be dissolved in a volume of 500.0 mL to make 8.00 mM Cu2*?The dissociation equation for the given salt is CuSO4 • 5 H2O -> Cu2* + S0, + 5 H203. How many ml of 15.8 M nitric acid should be diluted to 0.250 L to make 3.00M HNO3?4. Vinegar contains 5 wt% acetic acid. How many grams of vinegar are required to react with 5gof NaHCO3? The density of vinegar is close to 1.0 g/mL. How many mL of vinegar are required toreact with 5g of NaHCO3?The reaction of vinegar and sodium bicarbonate is given by the reactionNaHCO3 + CH3COOH → Na* + CO2 + H2O + CH3CO5. In a gravimetric analysis, we need enough product to weigh accurately. Each tablet provides~15mg of iron. How many tablets should we analyze to provide 0.25 g of Fe203 product?

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Chemistry: Principles and Practice

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ISBN:9780534420123

Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer

Chapter12: Solutions

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".

Question

MTY1103 ANALYTICAL CHEMISTRY - LABORATORY
PROBLEM SET 1
I. SOLUTIONS
1. Typical seawater contains 2.7g of salt (sodium chloride, NaCl) per 100mL. What is the molarity of
Nacl in the ocean?
2. Copper (II) sulfate pentahydrate, CuSO, 5 H20, has 5 moles of H20 for each mole of CuSO, in
the solid crystal. The formula mass of CuSO4 • 5 H20 is 249.68 g/mol. How many grams of CuSO4
• 5 H20 should be dissolved in a volume of 500.0 mL to make 8.00 mM Cu2*?
The dissociation equation for the given salt is CuSO4 • 5 H2O -> Cu2* + S0, + 5 H20
3. How many ml of 15.8 M nitric acid should be diluted to 0.250 L to make 3.00M HNO3?
4. Vinegar contains 5 wt% acetic acid. How many grams of vinegar are required to react with 5g
of NaHCO3? The density of vinegar is close to 1.0 g/mL. How many mL of vinegar are required to
react with 5g of NaHCO3?
The reaction of vinegar and sodium bicarbonate is given by the reaction
NaHCO3 + CH3COOH → Na* + CO2 + H2O + CH3CO
5. In a gravimetric analysis, we need enough product to weigh accurately. Each tablet provides
~15mg of iron. How many tablets should we analyze to provide 0.25 g of Fe203 product?

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