Abeaker contains 500ml of 12m potassium nitrate .what is the molarity of the new solution if 250 ml more water is added

8.0 M.

Explanation:

∴ (MV) of KNO₃ before dilution = (MV) of KNO₃ before dilution.

M = 12.0 M, V = 500.0 mL.

M = ??? M, V = 500.0 mL + 250.0 mL = 750.0 mL.

∴ M after dilution = (MV) before dilution / (V) after dilution = (12.0 M)(500.0 mL)/(750.0 mL) = 8.0 M.

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