Calculate the grams or mililiters of solute needed to prepare the following solu

ID: 893207 • Letter: C

Question

Calculate the grams or mililiters of solute needed to prepare the following solutions:

1) 40g of a 8.0% (m/m) KCl solution

2) 1500mL of a 8.0% (m/v) NH4Cl solution

3) 210mL of a 17.0% (v/v) acetic acid solution

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A patient needs 250g of glucose in the next 12 hours. How many liters of a 10% (m/v) glucose solution must be given?

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

1) 3.2g of LiNO3 from a 20%(m/m) LiNO3 solution

2) 33.0g of KOH from a 10.0%(m/m) KOH solution

3) 2.4mL of formic acid from a 8.0% (v/v) formic acid solution

grams or mg of solute needed:

40g of a 8% KCl solution

% KCl = mass of KCl / mass of solution

% KCl = mass of KCl / (mass of KCl + water)

0.08 = x / 40

x = 0.08*40 = 3.2 grams of KCl are needed

V = 1500 ml

8% NH4Cl mass per volume

0.08 = mass of NH4Cl / 1500 L

120 grams of NH4Cl

V = 210 ml of 17% v/v

0.17 = vol acetic / 210

vol acteic = 0.17*210 = 35.7 ml

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