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Question: (a) A solution has a pH of 7. Explain how you would : (i) increase ist pH; (ii) decrease its pH; (b) If a solution changes the colour of litmus from red to blue, what can you say about its pH? (c) What can you say about the pH of a solution, that liberates carbon dioxide from sodium carbonate ?

Answer»

Question:

(a) A solution has a pH of 7. Explain how you would :

(i) increase ist pH; (ii) decrease its pH;

(b) If a solution changes the colour of litmus from red to blue, what can you say about its pH?

(c) What can you say about the pH of a solution, that liberates carbon dioxide from sodium carbonate ?



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