How can you obtain potassium dichromate from sodium chromate?
Solution and Explanation
Potassium dichromate (K2Cr2O7) can be obtained from sodium chromate (Na2CrO4) through the following reactions:
- 2Na2CrO4 + 2H+ → Na2Cr2O7 + 2Na+ + H2O
- Na2Cr2O7 + 2KCl → K2Cr2O7 + 2NaCl
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If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?
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