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21 August, 05:31

Given the table below, what is the chemical formula for a compound between Na and the sulfate ion SO4 - 2?

nitrate ion NO3 - 1

phosphate PO4 - 3

sulfate SO4 - 2

acetate C2H3O2 - 1

ammonium NH4 + 1

chromate CrO4 - 2

carbonate CO3 - 2

dichromate Cr2O7 - 2

permanganate MnO4 - 1

sulfite SO3 - 2

a) NaSO4

b) Na2SO4

c) Na (SO4) 2

d) Na2 (SO4) 2

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  1. 21 August, 05:38
    0
    Answer is: b) Na₂SO₄.

    Oxidation number of sodium cation is + 1 (2· (+1) = + 2).

    Oxidation number of sulfate anion is - 2.

    Compounds must be electrically neutral.

    Sodium sulfate is inorganic compound (salt). Sodium sulfate is white solid substance and highly soluble in water.
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