20mL of 0.05MHCl and "30mL" of 0.05M `Ca(OH)_(2)` are mixed and water is added to obtain a solution having volume equal to "100mL" .Find the pH of this solution. (use `pK_(W)` =14)

50 mL of 0.1 M HCl and 50 mL of 2.0 M NaOH are mixed. The pH of the resulting solution is

20mL of 0.5 M HCl and 35 mL of 0.1 N NaOH are mixed. The resulting solution will

60ml of 0.1M HCl is mixed with 40ml of 0.05M H_(2)SO_(4) .The "pH" value of the resulting solution is

20 mL of 0.5 M HCl is mixed with 30 mL of 0.3 M HCl, the molarity of the resulting solution is :

A buffer solution is prepared by mixing 20 ml of 0.1 M CH_3COOH and 40 ml of 0.5 M CH_3COONa and then diluted by adding 100 ml of distilled water . The pH of resulting buffer solution is (Given pK_a CH_3COOH=4.76 )

20 mL of C_(2)H_(5)OH when mixed with 20ml of water,the volume of the resulting solution is