What mass of a 10% hydrochloric acid solution is required to prepare 500 g of a 0.5% solution?
| August 15, 2021 | education
For 1 kg of 10% hydrochloric acid solution, you must:
1000 * 10/100 = 100 (g) hydrochloric acid.
Mass of HCl in 500 g of 0.5% solution:
(500 * 0.5) / 100 = 2.5 (g).
Let’s make the proportion:
1000 g solution -> 100 g HCl
x g solution -> 2.5 g HCl
x = 2.5 * 1000/100 = 25 (g).
Answer: 25 grams.
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