How many litres of a 90% solution of concentrated acid needs to be mixed with a 75% solution of concentrated acid to get a 30 L solution of 78% concentrated acid?
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Step-by-step explanation:
● let the required volume of 90% solution =x
●the required volume of 75% solution =(30 - x)
●the final solution has the concentration of the 78% with volume 30 litres
●now forming equation
● 90 x + (30 - x) 75 = 78 × 30
● upon solving the above equation we get 6 =x
● so on mixing 6 litre of 90% concentrated acid with 24 litres of 75% concentrated acid we can get 30 litre of 78% concentrated acid
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