"15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr2O$_7^{2 - }$. The molarity of the Fe2+ solution is __________ $\times$ 10-2 M. (Round off to the Nearest Integer)."

Question

Accepted Answer

"$$C{r_2}{O_7}^{2 - } + F{e^{2 + }}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{}} C{r^{3 + }} + F{e^{3 + }}$$

Valance Factor of $C{r_2}{O_7}^{2 - }$ = 6

Valance Factor of $F{e^{2 + }}$ = 1

mili eq. of $C{r_2}{O_7}^{2 - }$ = mili eq. of Fe²⁺

6(0.03 $\times$ 20) = 1(M $\times$ 15)

M = 6(0.03)4/3

M = 0.24 M

M = 24 $\times$ 10^$-$2 M"

15 mL of aqueous solution of Fe²⁺ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr₂O$_7^{2 - }$. The molarity of the Fe²⁺ solution is __________ $\times$ 10^-2 M. (Round off to the Nearest Integer).

Solution

About this question

Drill 25 more like these. Every day. Free.

15 mL of aqueous solution of Fe2+ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr2O$_7^{2 - }$. The molarity of the Fe2+ solution is __________ $\times$ 10-2 M. (Round off to the Nearest Integer).

Solution

About this question

More Some Basic Concepts of Chemistry questions

Drill 25 more like these. Every day. Free.

15 mL of aqueous solution of Fe²⁺ in acidic medium completely reacted with 20 mL of 0.03 M aqueous Cr₂O$_7^{2 - }$. The molarity of the Fe²⁺ solution is __________ $\times$ 10^-2 M. (Round off to the Nearest Integer).