Cu + 2 AgNO3 → Cu(NO3)2 + 2 Ag How many grams of Cu would have to react to produce
89.5
grams
of Ag?

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

It's about -20°c to -15°c.