Chemistry Homework Help

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103 solutions

Dilution

#### Q. How many milliliters of 10.0 M HCl(aq) are needed to prepare 415.0 mL of 1.00 M HCl(aq)?

Solved • Jun 21, 2019

Dilution

#### Q. A pharmacist has 4 quarts of a 15% solution of iodine. How much alcohol must be added to reduce it to a 10% solution of iodine? (Mixture Algebraic Word Problems)

Solved • Jun 19, 2019

Dilution

#### Q. 153 mL of an aqueous solution of sodium chloride is diluted to 871 mL. If the new concentration of the solution is 8.64 M, calculate the original concentration of the solution.

Solved • Jun 7, 2019

Dilution

#### Q. 152 mL of an aqueous solution of sodium chloride is diluted to 890 mL. If the new concentration of the solution is 3.30 M, calculate the original concentration of the solution. Round your answer to three significant figures. Include the unit in your answer.

Solved • Jun 7, 2019

Dilution

#### Q. 181 mL of an aqueous solution of sodium chloride is diluted to 781 mL. If the new concentration of the solution is 7.69 M, calculate the original concentration of the solution.

Solved • Jun 7, 2019

Dilution

#### Q. A solution of 49.5% H2SO4 by mass has a density of 1.39 g/cm3 at 293 K. A 24.9 cm3 sample of this solution is mixed with enough water to increase the volume of the solution to 99.1 cm3 .Find the molarity of sulfuric acid in the obtained solution.

Solved • Jun 3, 2019

Dilution

#### Q. A chemist needs to create a series of standard Cu2+(aq) solutions for an absorbance experiment. For the first standard, he uses a pipet to transfer 20.00mL of a 2.30M Cu2+(aq) stock solution to a 500.0 mL volumetric flask, and he adds enough water to dilute to the mark. He then uses a second pipet to transfer 10.00mL of the second solution to a 100.0 mL volumetric flask and he adds enough water to dilute to the mark. Calculate the concentration of the Cu2+(aq) solution.

Solved • May 27, 2019