Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?

Does it decrease/increase to about 7 or decreases to 3 or icnrease to 12?Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
A solution of HNO3 will be quite acidic, perhaps around pH 1. Adding ZnCO3 will produce CO2 gas and Zn ions.





ZnCO3(aq) + HNO3(aq) --%26gt; Zn(NO3)2(aq) + CO2(g) + H2O





When the gas production stops the H+ from the acid will have been consumed (neutralized).





In reality, there will be no Zn(NO3)2, there will be zinc ions and nitrate ions. The zinc ions will hydrolyze to a slight extent producing Zn(OH)^+ and H+. The CO2 still in solution (CO2 is soluble in water) will hydrolyze to form a weakly acidic solution:





CO2 + H2O %26lt;==%26gt; H+ + HCO3^-





From this we can infer that after the neutralization of the HNO3, the resulting solution will still be acidic with a pH closer to 6.





============= Follow up ===============





Puchhki said. ';...carbonic acid the pH will be more than 7.';





I must respectfully disagree with Puchhki. What we think of as ';carbonic acid'; is not molecules of H2CO3, but rather the equilibrium between CO2, H2O, H+ and HCO3- as I've shown above. The solution will be acidic, and therefore have a pH below 7. Carbon dioxide dissolved in water contributes to acid rain. Acid rain has a pH below 7. CO2 dissolved in water will NOT be basic as Puchhki has suggested.Powdered zinc carbonate is added to a solution of nitric acid until effervescence ceases.pH level?
effervescence cease means that nitric acid has exhausted


now the solution has carbonic acid, unreacted Zn-carbonate and ZnCl2.


because of the carbonic acid the pH will be more than 7, but not extremely high-because H2CO3 is not a strong acid