अम्ल क्षार एवं लवण One Shot Revision | Bihar Board Class 10th Chemistry CH 2 Acids Bases & Salts

When acids an bases react they liberate some amount of energy which is represented as DeltaH neutralization if one equivalent of acid and base reacts. The energy liberated depends on the concentration of acid and base and also on whether the acid is strong or weak. For strong acids and bases, the value is constant and for weaker acids as bases the magnitude is generally lesser. Using this info and the date below answer the question that follow : [Given data : Delta_("neutralization")HCl//NaOH = - 14 Kcal//eq (at infinite dil.) DeltaH_("ionisation")CH_(3)COOH = 2kcal//mol DeltaH_("ionisation")NH_(4)OH = 3kcal//eq] In which of the following will heat released be same ?

When acids an bases react they liberate some amount of energy which is represented as DeltaH neutralization if one equivalent of acid and base reacts. The energy liberated depends on the concentration of acid and base and also on whether the acid is strong or weak. For strong acids and bases, the value is constant and for weaker acids as bases the magnitude is generally lesser. Using this info and the date below answer the question that follow : [Given data : Delta_("neutralization")HCl//NaOH = - 14 Kcal//eq (at infinite dil.) DeltaH_("ionisation")CH_(3)COOH = 2kcal//mol DeltaH_("ionisation")NH_(4)OH = 3kcal//eq] Which of the following option(s) is//are correct assuming weak acids/bases to be completely unionized ?

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A solution capable of maintaining its pH relatively constatn, when either excess acid or excess base is added, is said to be buffered While it is not usually considered a buffered solution, a concentrated solution (10^(-2) M and higher) of a strong acid or stong base is buffered against large changes in pH when acids or bases are added. Buffered solutions are usually those containing a wealk acid and a salt of that weak acid or a weak base and the salt of that weak base. For example a solution containing HAc and NaAC resists large change in pH when acid or alkali is added. For a buffer solution Buiffer capacity is defined as the number of moles of a strong acid or a strong base that causes 1 of the buffer to undergo a 1 unit change in pH. Buffer capacity is maximum when the molar ratio of the two components is unity and the buffer solution is considerred good. Which is the best buffer? CH_(3)COOH(pK_(a)=4.7),CH_(3)COONa(M=82),CH_(3)COOH(M=60)