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solve the following sub questions. 90% and 97% pure acid solutions are mixed to obtain 21 litres of 95% pure acid solution find the amount of each type of acid to be mixed to from the mixture​

Answer»

Step-by-step explanation:V1 = volume of 90% SOLUTION V2 = volume of 97% solution Volume of solution = V1 + v2 = 21 L  CONCENTRATION = 95% = (V1 * 90% + V2 * 97%) / 21   so  21 * 95 = 90 V1 + 97 V2                   = 90 V1 + 97 (21 - V1) = 97 * 21 - 7 V1 So     V1 = 6 L   and V2 = 15 L



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