How to figure out pH value change?

Determine the pH change that will occur when the following salt is dissolved in water:

K2SO3How to figure out pH value change?
Since K2SO3 produces SO3^2- in solution and it is the conjugate base of the very weak acid HSO3^1-, the solution will be basic. The pH will go up (above 7)How to figure out pH value change?
dependds how many people have been peeing in the water

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