The formula of sulphate of metal a M is M2SO4, determine the valency of the metal M and predict the formula of its dichromate, carbide, nitrate and phosphate.
Answers
Answer:
For given formula of sulphate of metal, its valency is +2.
(i) OH
−
is hydroxide ion. By balancing charge, formula of metal hydroxide ion is M(OH)
2
.
(ii) ClO
2
−
is chlorite ion. We need 2 such ions for charge balance. Hence metal chlorite M(ClO
2
)2.
(iii) Chloride has Cl
−
ion. Hence, metal chloride is MCl
2
.
(iv) NO
3
−
is nitrate ion. By charge balance, metal nitrate is M(NO
3
)
2
.
(v) NO
2
−
is nitrite ion. Hence M(NO
2
)
2
is metal nitrite.
(vi) Peroxide has O
−
ion. By charge balance, metal peroxide is MO
2
.
(vii) CrO
4
2−
is chromate ion. Hence, by balancing charges metal chromate is M(CrO
4
).
(viii) (PO
4
)
3−
is phosphate ion. By charge balance, metal phosphate is M
3
(PO
4
)
2
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