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14 April, 16:57

2. What is the molarity of a HCl solution containing 1.2 grams of hydrochloric acid in 0.025 L of solution?

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  1. 14 April, 17:10
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    1.3M

    Explanation:

    Convert from grams to moles:

    molar mass of HCl = 1.01g (molar mass of H) + 35.45g (molar mass of Cl) = 36.46g HCl

    1.2g HCl (1mol HCl/36.46g HCl)

    =.0329 mol HCl

    Molarity = mol/L (important formula for concentration)

    Plug your values in:

    Molarity =.0329mol/.025L

    1.317M - but you used two significant figures in the question, so:

    1.3M
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