The word "per mille" contacts in our consciousness amount of the alcohol drunk and dissolved in blood in recent years. However this term is familiar to us from school in connection with a subject on physical geography "Salinity of the World Ocean".
It is required to you
- elementary knowledge of mathematics
Instruction
1. The term of per mille means one thousand part of any substance which is present at other substance. For example, the salinity of water, equal 30.0 0/00 (per mille) means that one liter of this water contains 30 g of various salts. The average salinity of sea water is 35 0/00. In sea water 88.7% of chlorides are dissolved. Generally it is chloride sodium, that is ordinary table salt or NaCl.
2. The main method of determination of salinity of sea water – a titirovaniye method. To define salinity of water in your aquarium with sea inhabitants, take away from it in a separate vessel, for example, 1 liter. Add a certain amount of nitrate silver (AgNO3) to water test. Nitrate silver will connect to chloride sodium and will drop out in a deposit. Weigh the chloride silver which dropped out in a deposit and, considering that the relation of amount of chloride sodium to other substances is always constant, calculate salinity of water. However it will be simpler if you do measurement of salinity of water the hydrometer calibrated at the room temperature.
3. As for degreesalcoholicintoxication , it is also expressed in per mille. For example, if the device shows degree of intoxication 0.5 0/00, then it means that in 1 liter blood of the person 0.5 g of ethyl alcohol are dissolved. At the same time the quantity drunk with such indicator at different people will be a miscellaneous. The result, first, will depend on a floor, secondly, from the mass of the person. The woman has the same dose of alcohol, as at the man, on condition of their equality in weight, will show on the device big degree of intoxication. It is explained by the fact that in a male body the liquid share, including blood, makes 70% of all weight, and in only female 60%.
4. To calculate for itself approximate degree of intoxication in per mille, make simple calculations: Drunk in grams multiply quantity by the fortress of drink and divide result into your weight with coefficient 0.7 or 0.6. For example: Increase 250 g of vodka by 0.4 (fortress of vodka of 40%) and you receive 100 g. Divide the received result into your weight (you the man weighing 80 kg) and on To = 0.7.100: (80х0.7) = 100: 56 = 1.79 0/00. Such result will be directly after reception of 250 g of vodka.