📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

    Question

    A vessel has 20L of 25% acid solution. How much pure

    acid must be added to make it 40% acid?
    A 12 litres Correct Answer Incorrect Answer
    B 5 litres Correct Answer Incorrect Answer
    C 9 litres Correct Answer Incorrect Answer
    D 13 litres Correct Answer Incorrect Answer

    Solution

    ATQ,

    25% → pure acid = 5L. Let x = pure acid added → (5+x)/(20+x)=0.4 → 5 + x = 8+0.4x → 0.6x = 3 → x = 5L.

    Practice Next
    More Mixture Questions
    ask-question