100 mL of 0.1 N hypo solution is decolouris | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The chemical reactions involved are:$2CuSO_4 + 4KI 	o 2CuI_2 + 2K_2SO_4$$2CuI_2 	o Cu_2I_2 + I_2$$I_2 + 2Na_2S_2O_3 	o 2NaI + Na_2S_4O_6$From t

Vedclass · Accepted Answer

$2.5$

Vedclass · Answer

(C) The chemical reactions involved are:$2CuSO_4 + 4KI 	o 2CuI_2 + 2K_2SO_4$$2CuI_2 	o Cu_2I_2 + I_2$$I_2 + 2Na_2S_2O_3 	o 2NaI + Na_2S_4O_6$From the stoichiometry,$1 	ext{ mole of } CuSO_4 \cdot 5H_2O$ produces $0.5 	ext{ mole of } I_2$,which reacts with $1 	ext{ mole of } Na_2S_2O_3$ (hypo).Thus,the equivalent weight of $CuSO_4 \cdot 5H_2O$ is equal to its molecular weight $(250 \ g/eq)$.Equivalents of hypo = Equivalents of $CuSO_4 \cdot 5H_2O$$N 	imes V(L) = \frac{x}{	ext{Equivalent weight}}$$0.1 	imes \frac{100}{1000} = \frac{x}{250}$$0.01 = \frac{x}{250}$$x = 2.5 \ g$.

$100 \ mL$ of $0.1 \ N$ hypo solution is decolourised by the iodine liberated from the addition of $x \ g$ of crystalline copper sulphate to an excess of $KI$. The value of $x$ is ............. $g$ (molecular weight of $CuSO_4 \cdot 5H_2O$ is $250$).

Similar Questions

Number of moles of methane required to produce $22 \ g$ $CO_{2(g)}$ after combustion is $x \times 10^{-2}$ moles. The value of $x$ is

$5 \, L$ of a gaseous mixture of ethane and propane are burnt to produce total $11 \, L$ of $CO_2$. Volume percent of $C_2H_6$ in the initial mixture is

An iron alloy contains $54.7\%$ iron and has a density of $8.17 \, g \, cm^{-3}$. What is the number of iron atoms in an alloy block of dimensions $10 \, cm \times 15 \, cm \times 20 \, cm$?

The weight of sodium carbonate required to prepare $500 \ mL$ of a semi-normal solution is .......... $g$.

$0.1 \text{ mole}$ of potassium permanganate was heated at $300^{\circ}C$. What is the weight (in $g$) of the residue? ($Mn = 55 \text{ u}$,$K = 39 \text{ u}$,$O = 16 \text{ u}$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module