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dem82
29 days ago
7

What is the percentage by mass of solution formed by dissolving 36.0 grams of HCl in 98.0 grams of water?

Chemistry
2 answers:
Alekssandra [2.9K]29 days ago
5 0

Answer:

The mass percentage of the solution is 26.86%.

Explanation:

Hydrochloric acid mass = 36.0 g

Water mass = 98.0 g

The solution is composed of HCl and water.

Total mass of the solution =  36.0 g + 98.0 g = 134 g

Mass percentage of the solution:

\frac{\text{Mass of solute}}{\text{Mass of the solution}}\times 100

\frac{36 g}{134 g}\times 100=26.86\%

The mass percentage of the solution is 26.86%.

eduard [2.6K]29 days ago
4 0
Convert HCl and H2O to moles.

36.0 g of HCl = 0.987 moles HCl

98.0 g of H2O = 5.44 moles H2O

Based on the stoichiometric ratio for HCl,
there are 0.987 moles of H and 0.987 moles of Cl.

For H₂O, according to the stoichiometric ratio, you have 10.88 moles of H and 5.44 moles of O.

Combining them:
11.867 moles H
0.987 moles Cl
5.44 moles O

Revert the moles back to grams, then divide by the total mass and multiply by 100 for the percentage by mass.

11.867 moles H = 11.96 g H
0.987 moles Cl = 34.99 g Cl
5.44 moles O = 87.03 g O

11.96/(36.0+98.0)(100) = 8.93% for H
34.99/(36.0+98.0)(100) = 26.11% for Cl
87.03/(36.0+98.0)(100) = 64.96% for O.
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