SGI:04 – Calculate
|
THE HYDROMETER
Calculate |
| Basic facts: | 1 litre of water weighs 1 kg (1 000 grammes)1 litre of alcohol weighs 0.8 kg (800 grammes) |
| 1 litre of water weighs 1 000 grammes = which is neither more or less than 1 kg. That gives 1000 degrees on the hydrometer (specific gravity).1 litre of alcohol weighs 800 grammes. This would be 800 degrees on the hydrometer (specific gravity) if it had a scale long enough. |
1 litre water = 1 kg (1 000 grammes) |
1 litre alcohol = 800 grammes |
 |
10% alcohol/water – mixture100 ml alcohol x weight 0.8 = 80 grammes900 ml water = 900 grammes80 900 980 grammes980 grammes is (specific gravity) 980 hydrometer degrees |