how much pure acid should be added to 50ml of a 10% acid solution to give a 50% acid solution?

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how much pure acid should be added to 50ml of a 10% acid solution to give a 50% acid solution?
how much pure acid should be added to 50ml of a 10% acid solution to give a 50% acid solution?

how much pure acid should be added to 50ml of a 10% acid solution to give a 50% acid solution?
要加入多少纯酸到50ml 10%的酸溶液中才能得到50%的酸溶液?
x + 10% * 50 = 50% * （50 + x）
x = 40
答案：需要40ml纯酸.40ml pure acid should be added to the solution.
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