When 100 ml of 0.4 M CH_3 COOHis mixed with 100 ml of 0.2 M NaOH , the [H_3O]^(+)in the solution is approximately :[K_a (CH_3COOH)= 1.8 xx 10 ^(-5) ]

When 100 ml of 0.4 M CH_3 COOHis mixed with 100 ml of 0.2 M NaOH , the

1.	When 100 ml of 0.4 M CH_3 COOHis mixed with 100 ml of 0.2 M NaOH , the [H_3O]^(+)in the solution is approximately :[K_a (CH_3COOH)= 1.8 xx 10 ^(-5) ]
Answer» `1.8 xx 10 ^(-4) ` ` 1.8 xx 10 ^(-5)` ` 9 xx 10 ^(-6) ` ` 9xx 10 ^(-5) ` SOLUTION :`[H^(+) ] =([CH_3COOH])/([CH_3COO^(-)]) ` ` =1.8 xx 10 ^(-5)xx ( (100 xx 0.4- 100 xx 0.2))/( (100 xx 0.2 )) =1.8 xx 10 ^(_5)`