How much water do you need to dissolve 40 g of potassium carbonate to get a 10% solution?

univerkov | May 1, 2021 | education

Let’s use the formula for finding the mass fraction of a substance:
wr.w. (К2СО3) = (mr.w. (К2СО3) * 100%) / mr-ra (К2СО3)
Let us express the mass of the solution:
mr-ra (K2CO3) = (m.w. (K2CO3) * 100%) / w.w. (K2CO3)

Find the mass of the potassium carbonate solution:
mr-ra (К2СО3) = (40 g * 100%) / 10% = 400 g
Answer: 400 grams

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