how many grams of caco3 are needed to react with 15.2g of hcl​

Question

how many grams of caco3 are needed to react with 15.2g of hcl​

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Dulcie 3 months 2021-07-28T15:05:10+00:00 1 Answers 6 views 0

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    2021-07-28T15:06:58+00:00

    Answer:

    Balanced equation:

    CaCO3 (s) + 2HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l)

    1mol CaCO3 will react with 2 mol HCl

    Mol HCl in 32.8mL of 1.25M solution = 32.8mL / 1000mL/L * 1.25mol /L = 0.041 mol HCl

    This will react with 0.041/2 = 0.0205 mol CaCO3

    Molar mass CaCO3 = 100g/mol

    Mass of CaCO3 reacted = 0.0205mol *100g/mol = 2.05g CaCO3.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )