Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
|
What are some of the uses of alkalis? |
- Adjusting soil pH - Anti - acid tablets - Soap and Cleaners - Making glass - Dying fabric - Paper production |
|
|
What is an alkali? |
A compound that dissolves in water to give a solution with a pH higher than 7. An alkali can be neutralised by an acid to form a salt. |
|
|
Name four reasons why too much salt is harmful. |
- Raise blood pressure - Increase risk of heart attack/disease - Increase risk of stroke - Kidney problems |
|
|
Three ways of extracting salt from the environment? |
- Salt solution - Salt mining - Evaporating sea salt |
|
|
What are the main gases in clean air? |
- 78% nitrogen - 21% oxygen - 1% argon - small amount of other gases, like water vapourand carbon dioxide |
