Question

solid sodium bicarbonate was placed on a strip of pH paper the colour of the strip

Answer 1

id not change. Since sodium carbonate is in solid form. Ions dissociate in aqueous solutions only. but



NaHCO3 sodiumbicarbonate is basic in nature. pH paper show red colour in acids and blue colour in base.
If we take the moist pH paper and put even a tinge of sodium bicarbonate on it, it will show blue colour.