A) The \[pH\] of one litre solution containing\[0.49\,\,g\]of\[{{H}_{2}}S{{O}_{4}}\]is\[2.0\]
B) The conjugate base of\[{{H}_{2}}S\]is\[{{S}^{2-}}\]
C) \[B{{F}_{3}}\] is a Lewis base
D) Phenolphthalein is colourless in basic medium
Correct Answer: A
Solution :
\[w=0.49\,\,g\] \[E=49\] \[V=1000\,\,mL\] \[\therefore \] \[N=\frac{w\times 1000}{E\cdot V}\] \[=\frac{0.49\times 1000}{49\times 1000}\] \[=0.01\,\,N\] \[\therefore \] \[[{{H}^{+}}]=0.01\] \[\therefore \] \[pH=-\log [{{H}^{+}}]\] \[=-\log (1\times {{10}^{-2}})\] \[=2\]
You need to login to perform this action.
You will be redirected in
3 sec
