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6. When left open to oxygen, alcohols turn into carboxylic acids?
7. Esters are made from carboxylic acids and ...?
8. How do you make an ester?
- Reflux - Distill - Purify - Dry
- Dry - Dissolve - Purify - Distill
- Reflux - Dry - Distill - Purify
- Distill - Purify - Reflux - Dry
9. The arrow in a reversible reaction is the same as in a normal reaction?
10. Weak acids are...?
- Partially ionised
- Fully ionised
- Not ionised
11. Which is the best form of chemical analysis?
- Quantitative
- Qualitative
- Chromatography
12. Chromatography uses three phases?
13. The Rf value determines the chemical and is found by distance travelled by substance/distance travelled by solvent?
14. The calculation for concentration is...?
- concentration=Rf/mass
- concentration=volume/Rf
- concentration=mass/volume
- mass=concentration/volume
15. Titration's for acids are done using....?
- Carboxylic acids
- Esters
- Alkalis
- Calcium
16. To produce ethanol you can use yeast or ethene's and steam?
17. Why can't you make a high concentration ethanol if you use yeast?
- The yeast would denature
- It is not distilled
- The yeast makes it less strong