Calculate the amount of solution (g or mL) that contains each of the following a

Question

Calculate the amount of solution (g or mL) that contains each of the following amounts of solute. 1.) 8.2 g of LiNO3 from a 45% (m/m) LiNO3 solution. 2.) 31.0 g of KOH from a 5.00% (m/m) KOH solution. 3.) 2.3 mL of formic acid from a 17% (v/v) formic acid solution. Calculate the amount of solution (g or mL) that contains each of the following amounts of solute. 1.) 8.2 g of LiNO3 from a 45% (m/m) LiNO3 solution. 2.) 31.0 g of KOH from a 5.00% (m/m) KOH solution. 3.) 2.3 mL of formic acid from a 17% (v/v) formic acid solution. 1.) 8.2 g of LiNO3 from a 45% (m/m) LiNO3 solution. 2.) 31.0 g of KOH from a 5.00% (m/m) KOH solution. 3.) 2.3 mL of formic acid from a 17% (v/v) formic acid solution.

Explanation / Answer

1)

%m/m = mass of solute * 100 / mass of solution

45 = 8.2*100/mass of solution

mass of solution = 18 g

Answer: 18 g

2)

%m/m = mass of solute * 100 / mass of solution

5.00 = 31.0*100/mass of solution

mass of solution = 620 g

Answer: 620 g

3)

%v/v = volume of solute * 100 / volume of solution

17 = 2.3*100/volume of solution

volume of solution = 14 mL

Answer: 14 mL

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