229795 Which of the following will have the highest pH?
Exp:(a) For saturated solution of NaOHpH=15(b) MHCl(c) Human saliva(d) Lemon JuiceHence, option (a) is correct.
229796 The pH of 10−5MHCl solution is
10−8MHCl⟶10−8MH+Kπ=[H+]×[OH]10−14=(10−8+x)×x=10−8x+x2x=10−7 total [H+]=10−7+10−8=1.1×10−10pH=−log(1.1×10−7)=7−log1.1pH=6.99
229797 The dissociation constant of a weak monobasic acid Kn is 1×10−5. The pH of 0.1M of that acid would be:
Given values, Ka=1×10−5,pH= ?Concentration =0.1MNow, pH=−log[H+][H+]=Ka×Mor [H+]=1×10−5×0.1[H+]=1×10−3∴pH=−log[1×10−3] or pH=3
229798 Calculate the pH of a solution containing 0.2M CH3COOH and 0.1MCH3COONa. The K4 of CH3COOH=1.8×10−5(−log1.8× 10−5)=4.74
pH of aeidic buffer solutionpH=pKa+log[ salt ][ Acid ]Given that,Ka=1.8×10−5pH=−logKa+log[ salt ] Acid pH=−log1.8×10−5+log[0.1][0.2]=5log1010+−log1.8+log0.5=5−0.2552−0.3010=4.74−0.3010=4.43
