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Question
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution respectively. Each solution is divided into two portions (i) and (ii). Describe the effect of
- adding sodium hydroxide solution to each portion in turn till it is in excess.
- adding ammonium hydroxide to each portion in turn till it is in excess.
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Solution
| Solution | Effect of adding sodium hydroxide solution | Effect of adding ammonium hydroxide solution | ||
| Small amount | In excess | Small amount | In excess | |
| Calcium nitrate | White ppt. | No change | No ppt. | No change |
| Zinc nitrate | White ppt. | White ppt. dissolves to give a colourless solution | White ppt. | White ppt. dissolves to give a colourless solution |
| Lead nitrate | White ppt. | White ppt. dissolves to give a colourless solution | White ppt. | No change |
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