If you're trying to dilute a liquid, you would need 30% of the volume in water to mix. When using liquid reagents, the percent concentration is based upon volume per volume, i.e. #ml/100ml.
For example, if you wanted to make a 70% ethanol solution, 70 ml of 100% ethanol would be dissolved in 30 ml of water.
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| 11/09/2018, 1:59 PM | from 100 % I wanna get 70% |
| 11/09/2018, 3:46 PM | Re: from 100 % I wanna get 70% |