QJEEM21Ch7da5: JEE Main 2021 Chemistry - Class 11 JEEM21Ch7da5 Solution: The number of moles of NH 3 , that must be added to 2L of 0.80…

Question

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The number of moles of NH₃, that must be added to 2L of 0.80 M AgNO₃ in order to reduce the concentration of Ag⁺ ions to 5.0

\times

10^{$-$ 8} M (K_formation for [Ag(NH₃)₂]⁺ = 1.0

\times

10⁸) is ____________. (Nearest integer)

[Assume no volume change on adding NH₃]

Accepted Answer

Let moles added = a

JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Chemical Equilibrium Question 42 English Explanation

\frac{0.8}{(5 \times 10^{- 8}) (\frac{a}{2} - 1.6)} = 10^{8}

\Rightarrow

\frac{a}{2}

-

1.6 = 0.4

\Rightarrow

a = 4

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