How many grams of HCl should be dissolved in 250g of water to obtain a 10% HCl solution?

univerkov | November 22, 2020 | education

We will find the mass of a substance by the formula:
W% = m (in-va) * 100% / (m (in-va) + m (r-la)), only in the other direction
Let the mass unknown to us be equal to x, we compose the equation:
10% = x * 100% / (x + 250)
10x + 2500 = 100x
2500 = 90x
x = 2500 \ 90
x = 27.78 g
Answer: m (HCl) = 27.78 g

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