Question: When a pH meter was calibrated with a boric acidborate buffer with a pH of 9.40, the cell potential was +0.060 V. When the buffer

When a pH meter was calibrated with a boric acid–borate buffer with a pH of 9.40, the cell potential was +0.060 V. When the buffer was replaced with a solution of unknown hydronium ion concentration, the cell potential was +0.22 V. What is the pH of the solution?

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