What mass of a concentrated solution of nitric acid (68.0% HNO3 by mass) is needed to prepare 400.0 g of a 10.0% solution of HNO3 by m

Question

What mass of a concentrated solution of nitric acid (68.0% HNO3 by mass) is needed to
prepare 400.0 g of a 10.0% solution of HNO3 by mass?

in progress 0
Minh Khuê 3 years 2021-08-11T19:39:39+00:00 1 Answers 1886 views 0

Answers ( )

  1. quangkhai
    0
    2021-08-11T19:41:10+00:00
    Reply

    Answer:

    58.8 grams.

    Explanation:

    First we calculate how many HNO₃ grams are there in 400.0 g of a 10.0% solution:

    • Out of 100 g of a 10.0% solution, 10 g will be of HNO₃.
    • 400.0 g * 10.0/100 = 40 g HNO₃

    Then we calculate the mass of a 68.0% solution that would contain 40 grams of HNO₃:

    • 40 g HNO₃ * 100 g Solution/68 g HNO₃ = 58.8 g

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )