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26 September, 00:06

How many moles of CaC2 are needed to react completely with 45.0g H2O?

Equation: CaC2+2 H2O--> C2H2 + Ca (OH) 2.

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  1. 26 September, 04:05
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    In order to react with 45 g of water 1.25 moles of CaC₂ are required.

    Explanation:

    Given dа ta:

    Moles of CaC₂ needed = ?

    Mass of water = 45.0 g

    Solution:

    Chemical equation:

    CaC₂ + 2H₂O → C₂H₂ + Ca (OH) ₂

    Number of moles of water:

    Number of moles = mass / molar mass

    Number of moles = 45 g / 18 g/mol

    Number of moles = 2.5 mol

    Now we will compare the moles of water and CaC₂ from balance chemical equation:

    H₂O : CaC₂

    2 : 1

    2.5 : 1/2*2.5 = 1.25 mol

    In order to react with 45 g of water 1.25 moles of CaC₂ are required.
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