Question

Calculate the final concentration of each of the following. A.1.7 L of a 2.50 M HNO3...

Calculate the final concentration of each of the following.

A.1.7 L of a 2.50 M HNO3 solution is added to water so that the final volume is 6.5 L.

Express your answer to two significant figures and include the appropriate units.

B.Water is added to 0.40 L of a 5.2 M NaF solution to make 2.1 L of a diluted NaF solution.

Express your answer to two significant figures and include the appropriate units.

C.A 23.0 mL sample of an 7.4 % (m/v) KBr solution is diluted with water so that the final volume is 209.0 mL.

Express your answer to two significant figures and include the appropriate units.

D.A 6.5 mL sample of a 55.0 % (m/v) acetic acid (HC2H3O2) solution is added to water to give a final volume of 38 mL.

Express your answer to two significant figures and include the appropriate units.

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Homework Answers

Answer #1

A.

Final concentration = Initial concentration * Initial Volume / Final Volume = 1.7 L * 2.50 M/ 6.5 L = 0.65 M

B.

Final concentration = Initial concentration * Initial Volume / Final Volume = 0.40 L * 5.2 M/ 2.1 L = 0.99 M

C.

Final concentration = Initial concentration * Initial Volume / Final Volume = 7.4 % (m/V) * 23 mL/ 209 mL = 0.81 % (m/V)

D.

Final concentration = Initial concentration * Initial Volume / Final Volume = 55% (m/V) * 6.5 mL/ 38 mL = 9.4 % (m/V)

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