Question

question

1. the formula unit for the compound tin (iv) dichromate is

__________.
a) sn₂(cr₂o₇)₄
b) sn(cr₂o₇)₂
c) s₂(cr₂o₇)₄
d) s(cr₂o₇)₂

Explanation:

Step1: Determine the charge of tin (IV) ion

Tin (IV) ion has a charge of \( Sn^{4+} \).

Step2: Determine the charge of dichromate ion

Dichromate ion has a charge of \( Cr_2O_7^{2 -} \).

Step3: Use the criss - cross method

To balance the charges, we need 2 dichromate ions (\(2\times(- 2)=-4\)) for 1 tin (IV) ion (\(+4\)). So the formula is \( Sn(Cr_2O_7)_2 \).

Answer:

B. \( Sn(Cr_2O_7)_2 \)