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CBSE Class 11-science Answered

pls explain
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Asked by mufeedatvp2000 | 18 Apr, 2020, 02:21: PM
answered-by-expert Expert Answer
NH4Cl and NH3 forms a basic buffer solution.
If space pH equals 8. then space pOH equals 6 left square bracket OH to the power of minus right square bracket equals 10 to the power of negative 6 end exponent For space Metal space hydroxide space of space any space Metal space having space 2 space valency minus straight M left parenthesis OH right parenthesis subscript 2 rightwards arrow straight M to the power of plus 2 end exponent space plus 2 OH to the power of minus straight Q equals left square bracket straight M to the power of plus 2 end exponent right square bracket left square bracket OH to the power of minus right square bracket squared space left square bracket straight M to the power of plus 2 end exponent right square bracket equals fraction numerator 0.2 over denominator 2 end fraction equals 0.1 straight M space space left parenthesis because space now space volume space is space doubled right parenthesis So comma space straight Q equals 0.1 open parentheses 10 to the power of negative 6 end exponent close parentheses squared equals 10 to the power of negative 13 end exponent Precipitation space will space occur space when space straight Q greater than straight K subscript sp So comma space option space left parenthesis 3 right parenthesis space is space correct.
Answered by Ravi | 18 Apr, 2020, 09:25: PM

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