Questions from General Chemistry


Q: In the margin note on page 215, we suggest that the

In the margin note on page 215, we suggest that the term mass-balance equation may be something of a misnomer. Using a specific chemical system, discuss mass balance and show that mass balance and con...

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Q: Why do molar concentrations of some species appear as multiples in charge

Why do molar concentrations of some species appear as multiples in charge-balance equations?

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Q: Calculate the solubility of the solutes in Problem 7-10 for

Calculate the solubility of the solutes in Problem 7-10 for solutions in which the cation concentration is 0.030 M.

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Q: A 0.4126-g sample of primary-standard Na2CO3

A 0.4126-g sample of primary-standard Na2CO3 was treated with 40.00 mL of dilute perchloric acid. The solution was boiled to remove CO2, following which the excess HClO4 was back-titrated with 9.20 mL...

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Q: Suggest a method by which Pb21 can be precipitated homogeneously as PbS

Suggest a method by which Pb21 can be precipitated homogeneously as PbS.

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Q: What is peptization, and how is it avoided?

What is peptization, and how is it avoided?

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Q: Suggest a precipitation method for separation of K+ from Na+

Suggest a precipitation method for separation of K+ from Na+ and Li+.

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Q: Write an equation showing how the mass of the substance sought can

Write an equation showing how the mass of the substance sought can be converted to the mass of the weighed substance on the right.

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Q: Treatment of a 0.3500-g sample of impure potassium

Treatment of a 0.3500-g sample of impure potassium chloride with an excess of AgNO3 resulted in the formation of 0.3846 g of AgCl. Calculate the percentage of KCl in the sample.

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Q: The week 3 measurement in the data set of Problem 5-

The week 3 measurement in the data set of Problem 5-16 is suspected of being an outlier. Use the Q test to determine if the value can be rejected at the 95% confidence level. Answer

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