70% alcohol signifies the amount the alcohol present in 100 ml of the solution.
Considering the solvent to be water, 70% alcohol contains 70ml alcohol and 30ml water. Thus, the total comes out to 70 + 30 = 100ml. That's what the "%" signifies - (out of 100!)
This is a mixture of 70 % alcohol and 30 % water.
No sense question; better or not depends on the application.
The most important application is disinfection.
30% percent water and 70% ethyl
You can say that water is the solute.
3 percent alcohol
If WE Use 90% alcohol it will get evaporated, for 30% alcohol no reaction occurs as water content will be high . so, 70% is used
The percentage is between 50 % and 70 %. But is denatured alcohol, I don't recommend to drink.
First of all, because technological limits mean that we can only get alcohol at a purity of about 90%. 90% alcohol is also far more expensive than 70%, so it is more cost effective to use 70%. Ignoring all of that, the main reason is that 70% alcohol works just fine and sterilizes object very well.70%alcohol is the efficient concentration to denature the protein.
70%
2/3 of 70% and 1/3 of 10%
Because the concentration of alcohol is lower; you pay the alcohol not the water.
Alcohol is a type of organic solvent. Regardless, when alcohol is the majority of a mixture, it is considered the solvent, and when something else is the majority of the mixture, it is the solute.
3 percent alcohol
Yes, it is.
about 70%
35 percent 70 proof
20%
how much 95% alcohol must be used to prepare 1000 ml of 70% alcohol
70% alcohol means in hundred parts of it, 70 parts are pure alcohol, rest is water. 95% means 95 parts of pure alcohol in 100 parts, so 5 parts of water. It depends on the usage. As a solvent, 95% would be preferred. As antiseptic, both can be used, 75% being more common as medicinal spirit. For consumption, fairly dilute concentrations are preferred. Above 43% are rare so both the above concentrations are dangerous for consumption.
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If WE Use 90% alcohol it will get evaporated, for 30% alcohol no reaction occurs as water content will be high . so, 70% is used