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27 July, 18:35

What is the molarity of a HCl solution that contains 13.3 g of HCl in 447 mL of solution? Answer in units of M

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Answers (2)
  1. 27 July, 19:01
    0
    0.82M

    Explanation:

    Molar mass of HCL = 36.46g/mol

    No of mole = mass/molar mass

    No of mole = 13.3/36.46 = 0.365mol

    Conc. = n/V = 0.365/0.447 = 0.82M
  2. 27 July, 20:58
    0
    0.81M

    Explanation:

    Molarity, M = number of moles, n / Volume, V

    number of moles of HCl, n=

    mass of HCl / molar mass of HCl

    Mass of HCl = 13.3g

    Molar mass of HCl = 1 + 35.5 = 36.5g/mol

    n = 13.3/36.5=0.364mol

    V = 447mL=447/1000 L = 0.447L

    Note that M is mol/L, hence, we convert 447mL to L. 1 mL = 1/1000 L

    M=0.364mol/0.447L

    M = 0.81M

    Therefore, the molarity of the HCl solution is 0.81M
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