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29 August, 08:44

What quantity of a 30% solution do you need to make 150 mL of a 20% solution?

A. 100 mL

B. 50 mL

C. 150 mL

D. 200 mL

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Answers (1)
  1. 29 August, 11:43
    0
    Volume required = 100mL

    Step-by-step explanation:

    Let the volume of 30% solution required be = V mL

    Amount of solute in V mL of solution = 30% of V = 0.3V ... (i)

    This amount is also present in 150 mL of 20% solution

    For 150 mL of 20% solution we have amount of solute = 150 mL X 20%

    = 30 ... (ii)

    Thus equating i and ii we get

    0.3V = 30

    Thus V = 100 mL
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