i. a. blue (due to the water of crystallisation)
b. white (due to the loss of water of crystallisation after heating)
ii. 1 M HCl has a higher concentration of H+ ions as HCl is a stronger acid compared to CH3COOH.
(Reason: A strong acid produces more H+ ions on ionisation than a weak acid. Here HCl is a strong acid compared to CH3COOH).
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