Dissolution equilibrium of inorganic precipitation in universities What is the minimum concentration of hydrochloric acid needed to dissolve 0. 10mol MnS and CuS in 1.0L hydrochloric acid?

Neither you nor the answer is right, nor is your equation. Because in cold concentrated hydrochloric acid, no matter how high the concentration is (up to 40%), CuS will not dissolve, and bivalent Mn will not undergo redox reaction with CuS.

Calculated, the concentration of hydrochloric acid is 8.8 * 10-5 when MnS is dissolved, and 3.6 * 10 10 when CuS is dissolved (this is impossible and can't reach the highest concentration of hydrochloric acid).

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