Question

5. An alkali is a compound which, when dissolved in water, yields ______
negatively charged ion.
6. Bases give ______
colour with phenolphthalein.
7. An ______is a substance that changes its colour in acidic and basic solutions.​

Answer 1

Answer:

6. pink

7. indicator

Explanation:

Answer 2

5. Hydroxyl ions
6. Pink
7. Indicator