How much water does 1000 grams of 90% alcohol need to be diluted to 50%?

How much water does 1000 grams of 90% alcohol need to be diluted to 50%?

1000 * 90% / 50% - 1000 = 800g

How much water does 95% alcohol need to be diluted to 75%?

100 g 95% alcohol is about 75% with 26.67 g water

How many kg of water is needed to dilute 50 kg of 90% alcohol to 75% alcohol? (solved by fractional equation)

Suppose you need to add water x kg
50×0.9
----------- = 75% ====》X=10
50+X
That is, to add 10 kg of water, the alcohol concentration can be diluted to 75%

How much water should be added to dilute 95% alcohol 500 ml to 75% alcohol

Add 133 ml of water
The calculation method is as follows: in 500 ml alcohol, the pure alcohol is 500 * 95% = 475 ml
If the 475 ml alcohol is diluted to 75% alcohol, the total amount should be 475 / 75% = 633 ml
Then 633-500 = 133 ml, that's the extra water

To dilute 600 ml of 95% alcohol into 75% disinfectant alcohol, how many ml of water should be added?
The faster the better, the better simple formula!

Keep the quality of alcohol unchanged
You should add x ml of water
95%*600=75%(600+x)
x=160
You need to add 160 ml of water