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A chemist has two solutions of hydrochlo...

A chemist has two solutions of hydrochloric acid in stock. One is 50% solution and the other is 80% solution. How much of each should be used to obtain 100 ml of a 68% solution.

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A chemist has two solutions of hydrochloric acid in stock. One is 50% solution and the other is 80% solution. How much of each should be used to obtain 100ml of a 68% solution.

A chemist has one solution which is 50% acid and another solution which is 25% acid. How much each should be mixed to make 10 litres of a 40% acid solution ? (Use Cramer’s rule to solve the problem).

Knowledge Check

  • A pharmacist needs to strengthen a 15% alcohol solution to one of 32% alcohol. How much pure alcohol should be added to 400 mL of the 15% solution?

    A
    1000 ml
    B
    68 ml
    C
    100ml
    D
    128 ml

  • 600 g of sugar solution has 40% sugar in it. How much sugar should be added to make it 50% in the solution?

    A
    160 g
    B
    120 g
    C
    130g
    D
    140 g

  • 300g of salt solution has 40% salt in it. How much salt should be added to make it 50% in the solution?

    A
    40 g
    B
    60 g
    C
    70 g
    D
    80 g

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    A chemist has one solution which is 50% acid and another solution which is 25 % acid. How much each should be mixed to make 10 litres of a 40 % acid solution ? (Use Cramer's rule to solve the problem).

    A chemist has one solution containing 50% acid and a second one containing 25% acid. How much of each should be used to make 10 litres of a 40% acid solution?

    20 mL of a solution of sulphuric acid neutrlise 21.2 mL of 30 % solution of sodium carbonate. How much water should be added to 100 mL of this solution to bring down its strength to decinormal ?

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