Answer to Question #105590 in General Chemistry for anonymous

Question

1.Calculate the molarity (to at least three significant digits) of a solution created when 175 mL of a 1.4-M NaCl solution is added to 100. mL of a 2.8-M NaCl solution.

2. A chemist makes a solution of K2SO4 by dissolving 20.1 g K2SO4 in water to make 100.0 mL of solution. What is the concentration of SO42− ions in the solution? Assume that K2SO4 is the only solute in the solution. The molar mass of K2SO4 is 174.27 g/mol.

3 .Determine the concentration of a 1.00 M solution of sodium chloride (NaCl) after the following changes occur.

(a) Exactly one liter of the solution is mixed with 0.36 L of water.
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(b) Exactly one liter of the solution is left to evaporate until it has a volume of 0.25 L. (Assume that only the water evaporates from the solution.)
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Answer 1

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