Ask Question
14 March, 10:45

a 200 mL aqueous solution of ammonia has a concentration of 1.50 M. What mass of ammonia is dissolved in the solution?

+1
Answers (1)
  1. 14 March, 11:05
    0
    Answer: 51 grams

    Explanation:

    Ammonia is a gas with a chemical formula of NH3.

    Given that,

    Amount of moles of NH3 (n) = ?

    Volume of NH3 (v) = 200mL

    since the standard unit of volume is liters, convert 200mL to liters

    (If 1000mL = 1L

    200mL = 200/1000 = 0.2L)

    Concentration of NH3 (c) = 1.5M

    Since concentration (c) is obtained by dividing the amount of solute dissolved by the volume of solvent, hence

    c = n / v

    Make n the subject formula

    n = c x v

    n = 1.50M x 0.2L

    n = 3 moles

    Now, calculate the mass of ammonia

    Amount of moles of NH3 (n) = 3

    Mass of NH3 in grams = ?

    For molar mass of NH3, use the atomic masses:

    N = 14g; H = 1g

    NH3 = 14g + (1g x 3)

    = 14g + 3g

    = 17g/mol

    Since, n = mass in grams / molar mass

    3 moles = m / 17g/mol

    m = 3 moles x 17g/mol

    m = 51 grams

    Thus, 51 grams of ammonia was dissolved in the solution.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “a 200 mL aqueous solution of ammonia has a concentration of 1.50 M. What mass of ammonia is dissolved in the solution? ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers