Mg + 2HCl → MgCl2 + H2 How many grams of hydrochloric acid (HCI) is needed to produce 200g of H2?

Mg + 2HCl → MgCl2 + H2

How many grams of hydrochloric acid (HCI) is needed to produce 200g of H2?

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  1. Answer:

    7242.1g

    Explanation:

    The balanced equation for this reaction is as follows:

    Mg + 2HCl → MgCl2 + H2

    From the above equation, it can be observed that 2 moles of HCl is needed to produce 1 mole of H2.

    Using the formula below, we convert the mass of H2 to moles;

    Molar mass of H2 = 2.016g/mol

    mole = 200/2.016

    mole = 99.21mol of H2

    Since 2 moles of HCl is needed to produce 1 mole of H2.

    Then 99.21 moles of H2 will be produced by 99.21 × 2 = 198.4mol of HCl

    Molar mass of HCl = 1 + 35.5

    = 36.5g/mol

    Mole = mass/molar mass

    Mass = molar mass × mole

    Mass = 36.5 × 198.4

    Mass = 7242.1g

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