Question

Which mixture forms a buffer when dissolved in 1 litre of water
1 ) 0.2 mole of naoh + 0.2 mol HBR
2) 0.2 mole of NaCl + 0.2 mol HCL
3) 0.4 mol HNO2 + 0.2 mol n a o h
4) 0.5 mol NH3 + 0.5 mol HCL

Answer 1

Answer:

On mixing equal volumes of 1 M HCl and of 2 M CH3COONa, an acidic buffer solution is formed. Reason: The resultant mixture contains CH3COOH and CH3COONa which are parts of acidic buffer.

$<svg width="350" height="100" viewBox="0 0 100 100">\ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ <path fill="pink" d="M92.71,7.27L92.71,7.27c-9.71-9.69-25.46-9.69-35.18,0L50,14.79l-7.54-7.52C32.75-2.42,17-2.42,7.29,7.27v0 c-9.71,9.69-9.71,25.41,0,35.1L50,85l42.71-42.63C102.43,32.68,102.43,16.96,92.71,7.27z"></path>\ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ <animateTransform \ \textless \ br /\ \textgreater \ attributeName="transform" \ \textless \ br /\ \textgreater \ type="scale" \ \textless \ br /\ \textgreater \ values="1; 1.5; 1.25; 1.5; 1.5; 1;" \ \textless \ br /\ \textgreater \ dur="2s" \ \textless \ br /\ \textgreater \ repeatCount="0"> \ \textless \ br /\ \textgreater \ </animateTransform>\ \textless \ br /\ \textgreater \ \ \textless \ br /\ \textgreater \ </svg>$