A solution is $0.1 \mathrm{M}$ in $\mathrm{Cl}^{-}$and $0.001 \mathrm{M}$ in $\mathrm{CrO}_{4}^{2-}$.
Solid $\mathrm{AgNO}_{3}$ is gradually added to it
Assuming that the addition does not change in volume and $\mathrm{K}_{\mathrm{sp}}(\mathrm{AgCl})=1.7 \times 10^{-10} \mathrm{M}^{2}$ and $\mathrm{K}_{\mathrm{sp}}\left(\mathrm{Ag}_{2} \mathrm{CrO}_{4}\right)=1.9 \times 10^{-12} \mathrm{M}^{3}$
Select correct statement from the following :
$\mathrm{AgCl}$ precipitates first because its $\mathrm{K}_{\mathrm{sp}}$ is high.
$\mathrm{Ag}_{2} \mathrm{CrO}_{4}$ precipitates first as its $\mathrm{K}_{\text {sp }}$ is low.
$\mathrm{Ag}_{2} \mathrm{CrO}_{4}$ precipitates first because the amount of $\mathrm{Ag}^{+}$needed is low.
$\mathrm{AgCl}$ will precipitate first as the amount of $\mathrm{Ag}^{+}$ needed to precipitate is low.
Correct Option: , 4
(i) $\left[\mathrm{Ag}^{+}\right]$required to ppt $\mathrm{AgCl}(\mathrm{s})$
$\mathrm{Ksp}=\mathrm{IP}=\left[\mathrm{Ag}^{+}\right]\left[\mathrm{Cl}^{-}\right]=1.7 \times 10^{-10}$
$\left[\mathrm{Ag}^{+}\right]=1.7 \times 10^{-9}$
(ii) $\left[\mathrm{Ag}^{+}\right]$required to $\mathrm{ppt} \mathrm{Ag}_{2} \mathrm{CrO}_{4}(\mathrm{~s})$
$\mathrm{Ksp}=\mathrm{IP}=[\mathrm{Ag}+]^{2}\left[\mathrm{CrO}_{4}^{-2}\right]=1.9 \times 10^{-12}$
$\left[\mathrm{Ag}^{+}\right]=4.3 \times 10^{-5}$
$\left[\mathrm{Ag}^{+}\right]$required to $\mathrm{ppt} \mathrm{AgCl}$ is low so $\mathrm{AgCl}$ will $\mathrm{ppt}$ $1^{\mathrm{st}}$.
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All Study Material
- JEE Main
- Exam Pattern
- Previous Year Papers
- PYQ Chapterwise
- Physics
- Kinematics 1D
- Kinemetics 2D
- Friction
- Work, Power, Energy
- Centre of Mass and Collision
- Rotational Dynamics
- Gravitation
- Calorimetry
- Elasticity
- Thermal Expansion
- Heat Transfer
- Kinetic Theory of Gases
- Thermodynamics
- Simple Harmonic Motion
- Wave on String
- Sound waves
- Fluid Mechanics
- Electrostatics
- Current Electricity
- Capacitor
- Magnetism and Matter
- Electromagnetic Induction
- Atomic Structure
- Dual Nature of Matter
- Nuclear Physics
- Radioactivity
- Semiconductors
- Communication System
- Error in Measurement & instruments
- Alternating Current
- Electromagnetic Waves
- Wave Optics
- X-Rays
- All Subjects
- Physics
- Motion in a Plane
- Law of Motion
- Work, Energy and Power
- Systems of Particles and Rotational Motion
- Gravitation
- Mechanical Properties of Solids
- Mechanical Properties of Fluids
- Thermal Properties of matter
- Thermodynamics
- Kinetic Theory
- Oscillations
- Waves
- Electric Charge and Fields
- Electrostatic Potential and Capacitance
- Current Electricity
- Thermoelectric Effects of Electric Current
- Heating Effects of Electric Current
- Moving Charges and Magnetism
- Magnetism and Matter
- Electromagnetic Induction
- Alternating Current
- Electromagnetic Wave
- Ray Optics and Optical Instruments
- Wave Optics
- Dual Nature of Radiation and Matter
- Atoms
- Nuclei
- Semiconductor Electronics: Materials, Devices and Simple Circuits.
- Chemical Effects of Electric Current,