Redox and Equivalent ConceptHard

Question

Magnesium hydroxide is the white milky substance in milk of magnesia. What mass of Mg(OH)2 is formed when 15 ml of 0.2 M-NaOH is combined with 12 ml of 0.15 M-MgCl2?

Options

A.0.087 g
B.0.079 g
C.0.1044 g
D.0.522 g

Solution

$n_{eq}\text{ of NaOH = }\frac{15 \times 0.2}{1000} \times 1 = 3 \times 10^{- 3}$

$n_{eq}\text{ of MgC}\text{l}_{2}\text{ = }\frac{12 \times 0.15}{1000} \times 2 = 3.6 \times 10^{- 3}$

Hence, NaOH is a limiting reagent.

Now, the mass of Mg(OH)2 formed = 3 × 10–3 × 29 = 0.087 g.

Create a free account to view solution

View Solution Free
Topic: Redox and Equivalent Concept·Practice all Redox and Equivalent Concept questions

More Redox and Equivalent Concept Questions

The ratio of coefficients of HNO3, Fe(NO3)2 and NH4NO3 in the following redox reaction,Fe + HNO3 → Fe(NO3)2 + NH4NO3 + H...When copper is treated with a certain concentration of nitric acid, nitric oxide and nitrogen dioxide are liberated in e...In the reaction, Zn + HNO3 → Zn(NO3)2 + NO + H2O, the equivalent weight of HNO3 is...At 298 K, the standard reduction potentials are 1.51 V for MnO4- |Mn2+, 1.36 V for Cl2|Cl- , 1.07 V for Br2|Br, and 0.54...A quantity of 1 g of metal ion, M2+ was discharged by the passage of 1.81 × 1022 electrons. The atomic mass of the metal...