JEE Mains · Chemistry · STD 11 - 6.2. Equilibrium - II (icon Equilibrium)
The dissociation constant of acetic is \(x \times 10^{-5}\). When \(25 mL\) of \(0.2\,M\,CH COO _3 COO\) solution is mixed with \(25\,mL\) of \(0.02\,M\,CH { }_3 COOH\) solution, the \(pH\) of the resultant solution is found to be equal to 5 . The value of \(x\) is \(..........\).
- A \(100\)
- B \(12\)
- C \(10\)
- D \(18\)
Answer & Solution
Correct Answer
(C) \(10\)
Step-by-step Solution
Detailed explanation
Buffer of \(HOAc\) and \(NaOAc\) \(pH = pKa +\log \frac{0.1}{0.01}\) \(5= pKa +1\) \(pKa =4\) \(Ka =10^{-4}\) \(x =10\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- The group 14 elements A and B have the first ionisation enthalpy values of \(708\) and \(715 \mathrm{~kJ} \mathrm{~mol}^{-1}\) respectively. The above values are lowest among their group members. The nature of their ions \(\mathrm{A}^{2+}\) \(\mathrm{B}^{4+}\) respectively is _______.JEE Mains 2025 Hard
- \(0.400\,g\) of an organic compound \(( X )\) gave \(0.376\,g\) of \(AgBr\) in Carius method for estimation of bromine. \(\%\) of bromine in the compound \(( X )\) is \(.........\).(Given: Molar mass \(AgBr =188\,g\,mol ^{-1} Br =80\,g\) \(\left.mol ^{- I }\right)\)JEE Mains 2023 Medium
- Uracil is base present in \(RNA\) with the following structure. \(\%\) of \(N\) in uracil is \(............\).
Given :
Molar mass \(N =14\,g\,mol ^{-1} ; O =16\,g\,mol ^{-1} ; \)
\(C =12\,g\,mol ^{-1} ; H =1\,g\,mol ^{-1}\);
JEE Mains 2023 Medium - The number of incorrect statement \(/ s\) about the black body from the following is \(........\). \((A)\) Emit or absorb energy in the form of electromagnetic radiation \((B)\) Frequency distribution of the emitted radiation depends on temperature \((C)\) At a given temperature, intensity vs frequency curve passes through a maximum value \((D)\) The maximum of the intensity vs frequency curve is at a higher frequency at higher temperature compared to that at lower temperatureJEE Mains 2023 Hard
- Given below are two statements :
Statement I : Ozonolysis followed by treatment with \(\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}\) of cis-2-butene gives ethanal.Statement II : The production obtained by ozonolysis followed by treatment with \(\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}\) of 3, 6-dimethyloct-4-ene has no chiral carbon atom.
In the light of the above statements, choose the correct answer from the options given belowJEE Mains 2025 Hard - Given below are two statements :
Statement (I) : Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode.
Statement (II) : The rate of corrosion is more in alkaline medium than in acidic medium.
In the light of the above statements, choose the correct answer from the options given below :JEE Mains 2025 Easy
More PYQs from JEE Mains
- When borax is heated with \(CoO\) on a platinum loop, blue coloured bead formed is largely due toJEE Mains 2022 Medium
- If for some \(\alpha\) and \(\beta\) in \(R,\) the intersection of the following three planes \(x+4 y-2 z=1\) ; \(x+7 y-5 z=\beta\) ; \(x+5 y+\alpha z=5\) is a line in \(\mathrm{R}^{3},\) then \(\alpha+\beta\) is equal toJEE Mains 2020 Hard
- \(KMnO _4\) oxidises \(I ^{-}\)in acidic and neutral/faintly alkaline solution, respectively toJEE Mains 2023 Hard
- A particle is executing simple harmonic motion with time period 2 s and amplitude 1 cm . If D and d are the total distance and displacement covered by the particle in 12.5 s , then \(\frac{\mathrm{D}}{\mathrm{d}}\) is ________.JEE Mains 2025 Easy
- Match List \(-I\) with List \(-I I\)
સૂચી \(- I\) સૂચી \(- II\) \((A)\) \(\left[ PtCl _{4}\right]^{2-}\) \((I)\) \(sp ^{3} d\) \((B)\) \(BrF _{5}\) \((II)\) \(d ^{2} sp ^{3}\) \((C)\) \(PCl _{5}\) \((III)\) \(dsp ^{2}\) \((D)\) \(\left[ Co \left( NH _{3}\right)_{6}\right]^{3+}\) \((IV)\) \(sp ^{3} d ^{2}\) JEE Mains 2022 Medium - Let \( A=\{x :|x^{2}-10|\le6\} \) and \( B=\{x :|x-2|>1\}. \) ThenJEE Mains 2026 Hard