Advice 1: How to check the quality of alcohol

There are moments when it is necessary to check the quality of food and drinks. Of course, testing in the laboratories of the most accurate, but the check quality can be at home. For example, you can check the quality of alcohol.
How to check the quality of alcohol
You will need
  • Mirror;
  • - alcohol;
  • - potassium permanganate.
Instruction
1
The alcohol may contain various impurities fusel oils that are poisonous and hazardous to health. There are several ways to check the quality of alcohol on their own, at home. For reliability, it is better to use them all.
2
Mix 1 tablespoons of alcohol and as much clean, cold water. Quickly rinse your mouth with alcohol and take it out. If you feel the taste of plastic, so the quality of alcohol is poor.
3
Take the mirror and carefully wash the baking soda. Rinse it under running water. Leave the mirror to dry. Do not wipe it and do not rush the drying process. To completely dry the surface of the mirror put a few drops of alcohol. Now we need to wait until the alcohol has evaporated completely. The evaporation process needs to be natural, speed it up is impossible. When a drop of the alcohol will evaporate, and see if there's any traces and stains on the mirror. If no divorce, then the pure alcohol. If there are stains, it means that the alcohol contains oil, and the more divorces, the more of them .
4
Add in a glass of water a few crystals of potassium permanganate. Supposed to be a weak solution. In a clean container, pour three tablespoons of the alcohol, then add one tablespoon of solution of potassium permanganate. Next is to observe and watch for a while.
If alcohol will be painted in the color of the potassium permanganate for five minutes, then the alcohol is of good quality. If staining happens before then, alcohol contains impurities. The faster the staining will occur, the more impurities. The temperature of the alcohol should be 15-20 degrees.
5
How strong the alcohol can be determined by the alcoholometer, which is sold in hardware stores. You can also pour a little alcohol on the table and set on fire, stronger than burning, the alcohol stronger.
Note
Abuse of alcohol is dangerous for health.

Advice 2: How to check water quality

In most cases, people use water from the tap for drinking and cooking, not really thinking about its quality. Water mixed with sand and rust, with high stiffness are not uncommon in Russia. To check its quality can be using folk ways.
chistaja voda
You will need
  • - Tap water;
  • Soft drinking water;
  • - Black tea;
  • Plastic bottle;
  • Mirror;
  • - Potassium permanganate;
  • Soap.
Instruction
1
Buy at the pharmacy bottle of soft purified water with a small amount of minerals. Brew of it and tap water a strong tea in two different circles. Compare the look of bubbles on the surface of the tea. The greater the difference, the less high-quality water comes from the tap.
2
Another way to test water quality with the help of welding. Strong freshly brewed black tea dilute with water from the tap. If the liquid is purchased the peach color and looks transparent, the tap water is excellent quality. If the diluted tea dimmed, expose the water before drinking and cooking pre-treatment.
3
In a plastic bottle type water from the tap and place in a dark place. View water on the light after 2 days. If the liquid has acquired a greenish hue on the water surface can be seen an oily film on the walls of the bottle formed plaque, to consume this water is strictly forbidden!
4
To test the quality of water using mirrors. A reflective surface, apply a drop of water from the tap and wait until it is completely dry. If the mirror was clean, the water quality is not questioned. If the mirror is left a muddy stain in the liquid impurities are present. It is possible that the water is too high stiffness.
5
Dissolve a few crystals of potassium permanganate in water to obtain a light pink color. If the solution will quickly become yellow, the quality of tap water is low. If the pink tint lasts a long time – tap flows clean water.
6
Laundry soap grate small shavings and pour hot water. If the water is soft, soap will dissolve completely if the fluid level exceeded the content of minerals on the surface of the water forming the insoluble film. In water with very high concentration of minerals will float the soap flakes. Such water should definitely be filtered and boiled before use.
Note
To determine how hard is the tap water, you can scale in the kettle. The faster it is formed on the walls of the heating appliance, the greater the level of minerals in the water.
Useful advice
Aquarists can determine the quality of water on the behavior of freshwater mussels of the family Unionidae. If the water appear even minor impurities, clams are tightly closed valves of shells.
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