Question

Столовий оцет містить 175г оцтової кислоти, масова частка її в столовому оцті 9%. Знайдіть об’єм води, який використали для приготування столового оцту та масу всього розчину оцтової кислоти.

Answer 1

1) масса раствора уксусной кислоты:
m = V/ω = 175/0,09 = 1944,4 u
2) масса воды = масса раствора - масса уксуса = 1944,4 - 175 = 1769,4 г
3) V(H2O) = m/p = 1769,4/1 = 1769,4 мл

Answer 2

M(H2O) = m(CH3COOH)/ω-m(CH3COOH) 
m(H2O) = 175/0,09-175 = 1769.44 г
V(H2O) = 1769.44 г/1 г/мл = 1769,44 мл

Answer 3

Calculating the Volume of Water and the Total Mass of the Vinegar Solution

To calculate the volume of water used to prepare the vinegar solution and the total mass of the acetic acid, we can use the given information about the mass fraction of acetic acid in the vinegar and the total mass of acetic acid.

Given: - Mass of acetic acid = 175 g - Mass fraction of acetic acid in vinegar = 9%

We can use the formula: \[ \text{Mass of acetic acid} = \text{Mass fraction of acetic acid} \times \text{Total mass of the vinegar solution} \]

Let's calculate the total mass of the vinegar solution first.

Calculating the Total Mass of the Vinegar Solution

The mass fraction of acetic acid in the vinegar is 9%, which means the mass of acetic acid is 9% of the total mass of the vinegar solution. We can use this information to calculate the total mass of the vinegar solution.

\[ \text{Mass of acetic acid} = 9\% \times \text{Total mass of the vinegar solution} \]

\[ \text{Total mass of the vinegar solution} = \frac{\text{Mass of acetic acid}}{9\%} \]

\[ \text{Total mass of the vinegar solution} = \frac{175 \, \text{g}}{0.09} \]

\[ \text{Total mass of the vinegar solution} = 1944.44 \, \text{g} \]

The total mass of the vinegar solution is 1944.44 grams.

Calculating the Volume of Water

To find the volume of water used to prepare the vinegar solution, we can subtract the mass of acetic acid from the total mass of the vinegar solution. This will give us the mass of water in the solution.

\[ \text{Mass of water} = \text{Total mass of the vinegar solution} - \text{Mass of acetic acid} \]

\[ \text{Mass of water} = 1944.44 \, \text{g} - 175 \, \text{g} \]

\[ \text{Mass of water} = 1769.44 \, \text{g} \]

The mass of water used to prepare the vinegar solution is 1769.44 grams.

Summary

- Volume of water used: 1769.44 grams - Total mass of the vinegar solution: 1944.44 grams