What type of chemical reaction is shown below?*
H2CO3 (aq)
+ H2O
(1)
+ CO2 (g)
combustion
O synthesis
decomposition
single replacement
double replacement

H2CO3 + H2O —> H20 + C2 is a single displacement

Answer:             1.0  × 10⁻⁵ msolution:                     as we know ph is given as,                                    ph  = -log [h⁺]and,                                    [h⁺]  =  10^-ph    (1)putting value of ph in eq. 1,                                    [h⁺]  =  10⁻⁵                                    [h⁺]  =  1.0  × 10⁻⁵ m