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3 years ago

What mass of magnesium phosphate contains 15g of magnesium?

Chemistry

1 answer:

tekilochka [14]3 years ago

7 0

81.875 g of magnesium phosphate Mg₂(PO₄)₃

Explanation:

The chemical formula of magnesium phosphate is Mg₃(PO₄)₂.

molar mass of Mg₃(PO₄)₂ = atomic weight of Mg × 3 + atomic weight of P × 3 + atomic weight of O × 3 × 4

molar mass of Mg₃(PO₄)₂ = 24 × 3 + 31 × 2 + 16 × 2 × 4 = 262 g/mole

Knowing the molar mass of Mg₃(PO₄)₂, we devise the following reasoning:

if in 262 g of Mg₂(PO₄)₃ there are 48 g of Mg

then in X g of Mg₂(PO₄)₃ there are 15 g of Mg

X = (262 × 15) / 48 = 81.875 g of Mg₂(PO₄)₃

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The titration of 25.0 mL of an iron(II) solution required 18.0 mL of a 0.145 M solution of dichromate to reach the equivalence p

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Answer:

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Explanation:

Given:

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Now, molarity of iron(II) solution is given as:

Molarity = Moles ÷ Volume

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