The disinfectant alcohol in the hospital is made up of pure alcohol and distilled water in a ratio of 3:1. Now there are 600 grams of pure alcohol. How many grams of distilled water do you need to add?

The disinfectant alcohol in the hospital is made up of pure alcohol and distilled water in a ratio of 3:1. Now there are 600 grams of pure alcohol. How many grams of distilled water do you need to add?

600 × 13 = 200 (g); a: 200 g distilled water should be added

How many kilos of distilled water is needed to prepare 10% alcohol with 2.5000 grams of 40% alcohol
How many kilos of distilled water is needed to prepare 10% alcohol with 2.5000 grams of 40% alcohol

2.5x40% △ 10% = 1 △ 10% = 10kg
Add distilled water 10-2.5 = 7.5kg
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The ratio of pure alcohol to distilled water in medical alcohol is 3:1. How many milliliters of pure alcohol are needed to prepare 5000 milliliters of this kind of medical alcohol?

5000 ÷ (3 + 1) × 3 = 3750 ml

How many milliliters of pure alcohol and distilled water is the volume ratio of 3 to 1

The volume ratio of 3 ml pure alcohol to 1 ml distilled water is 3:1. The volume ratio of water is 510 ml / 3 = 170 ml

The ratio of pure alcohol to distilled water in medical alcohol is 4:1. How many ml pure alcohol and distilled water are needed to prepare 2500 ml medical alcohol?

Pure alcohol volume = 2500 × 4 / 5 = 2000 ml
Volume of water = 2500 × 1 / 5 = 500 ml
That is, 2000 ml of pure alcohol and 500 ml of distilled water are required

How much distilled water can dilute 100 ml 95% medical alcohol to 75% alcohol

If the volume of mixing water and alcohol is not reduced:
The added distilled water is 100 * 95% / 75% - 100 = 26.7ml
If it's for home use: add 25ml of water!

Excuse me: what method can be used to make anhydrous ethanol from industrial alcohol? Is direct distillation OK

Industrial alcohol is a mixture of ethanol and water, both of which are azeotropes. In distillation, the composition of gas phase and liquid phase is the same, so anhydrous alcohol can not be obtained by distillation. In the preparation of anhydrous alcohol, quicklime (CAO) is added to industrial alcohol for heating, so that the water in the alcohol reacts with calcium oxide to remove water, and then distillation

How to make anhydrous ethanol in laboratory

1. Anhydrous ethanol produced in the laboratory will be absolutely anhydrous. It can be dehydrated with quicklime, anhydrous sodium sulfate and copper sulfate, but calcium chloride can not be used, because it will form a combination of ethanol and calcium chloride. Distillation method is no longer suitable for deep drying

How to prepare 95% ethanol from anhydrous ethanol?
What is 1,5% water? 5% of the ethanol? If ethanol 100ml, add water 5ml? After adding 5ml, is the total volume 105ml? If it's 105 ml, is 100 divided by 105 equal to 95%?
2. Is it OK not to distill? Is there a simple way to prepare

No, it's not
The gap between ethanol molecules is large, which can hold water molecules. Therefore, 100ml ethanol and 5ml water are less than 105ml
Take 95ml ethanol and pour it into a 100ml volumetric flask. Add water to the volume of 100ml

In order to make anhydrous ethanol from industrial alcohol, what kind of mixture does industrial alcohol usually need?

In order to make anhydrous ethanol, it is necessary to mix high-purity ethanol with quicklime, i.e. calcium oxide, and then filter. However, industrial ethanol generally contains impurities such as methanol. It is recommended not to extract anhydrous ethanol from industrial ethanol