Betekenis van:
effervescence

Voorbeeldzinnen

1. If effervescence is seen, continue heating for 30 minutes.
2. Add hydrochloric acid (3.1) dropwise with agitation until all effervescence has stopped.
3. At the end of this time there should be no more effervescence.
4. Add 20 ml of water and hydrochloric acid (3.2) until effervescence ceases.
5. The ash is alkaline, and an effervescence occurs when acid is added
6. Transfer the ash into a 250 ml beaker. Add 20 ml of water and hydrochloric acid (3.2) until effervescence ceases.
7. Add 25 ml of water and 25 ml of hydrochloric acid (3.1) successively, mix and wait for effervescence to cease.
8. When a stream of the sample is passed through a solution of barium hydroxide, a white precipitate is produced which dissolves with effervescence in dilute acetic acid
9. Dissolves with effervescence in diluted acetic acid, in diluted hydrochloric acid and in diluted nitric acid, and the resulting solutions, after boiling, give positive tests for calcium.
10. Dissolves with effervescence in diluted acetic acid, in diluted hydrochloric acid and in diluted nitric acid, and the resulting solutions, after boiling, give positive tests for calcium. Purity
11. If effervescence is seen, continue heating for 30 minutes. Allow solution to cool for at least 20 minutes with the nitrogen flowing through it.’
12. Adjust the nitrogen to provide a moderate flow through the solution, bring the solution to boiling point and heat for two minutes. At the end of this time there should be no more effervescence.