| A | B |
|---|
| colour of universal indicator in an alkaline solution | blue, indigo or violet (depending on the strength of the solution) |
| colour of universal indicator in an acidic solution | yellow, orange or red (depending on the strength of the solution) |
| colour of universal indicator in a neutral solution | green |
| colour of universal indicator in rainwater | yellow |
| colour of phenolphthalein in sodium hydroxide solution | pink |
| colour of phenolphthalein in hydrochloric acid | colourless |
| colour of methyl orange in nitric acid | red |
| colour of methyl orange in potassium hydroxide solution | yellow |
| acidic solutions have pH values | less than 7 |
| alkaline solutions have pH values | greater than 7 |
| sodium chloride solution has a pH of | 7 |
| a solution with a pH of 2 will turn methyl orange | red |
| a solution with a pH of 12 will turn methyl orange | yellow |
| rainwater will turn universal indicator | yellow |
| Sodium hydroxide solution added to dilute hydrochloric acid until in excess will turn the phenolpthalein in the acid from | colourless to pink |
| Sodium hydroxide solution when added to hydrochloric acid until in excess will turn the methyl orange in it from | red to yellow |
| colour of litmus in acids | red |
| colour of litmus in alkalis | blue |
