Question 17
Materials: Safety goggles; gloves; eight beakers with 10 cm³ of each of these substances: distilled water, lemon juice, vinegar, liquid soap, fizzy drink (such as cola), dilute bleach, dilute hydrochloric acid, sodium hydroxide solution; red litmus paper; blue litmus paper.
1. Work in pairs. Put on your safety goggles and gloves.
2. Dip a strip of blue litmus paper into each substance. Then, dip a strip of red litmus paper into the same substance. Use a different strip for each substance.
Caution: Wipe up spills as soon as they happen. If any substance spills on your hands, replace your gloves with a clean pair. Wash your hands after doing this activity.
Record your observations in the table.
| Substance | ___ | ___ |
|:-|:-|:-|
| Distilled water | | |
| Lemon juice | | |
| Vinegar | | |
| Liquid soap | | |
| Fizzy drink | | |
| Dilute bleach | | |
| Dilute hydrochloric acid | | |
| Sodium hydroxide solution | | |
1. Work in pairs. Put on your safety goggles and gloves.
2. Dip a strip of blue litmus paper into each substance. Then, dip a strip of red litmus paper into the same substance. Use a different strip for each substance.
Caution: Wipe up spills as soon as they happen. If any substance spills on your hands, replace your gloves with a clean pair. Wash your hands after doing this activity.
Record your observations in the table.
| Substance | ___ | ___ |
|:-|:-|:-|
| Distilled water | | |
| Lemon juice | | |
| Vinegar | | |
| Liquid soap | | |
| Fizzy drink | | |
| Dilute bleach | | |
| Dilute hydrochloric acid | | |
| Sodium hydroxide solution | | |
