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Dilute 147.4 ml of 95% etoh to 200 ml with di h20 for a 70% solution. 70% of 200 ml is 140 ml, so you would need **140ml** of pure ethanol.

For example, to make 70% ethanol from 95% ethanol, take **70 mL of 95% ethanol and add enough water to bring the volume to 95 mL**. You will then have 95 mL of 70% ethanol. This works for any dilution and all that is required is a large enough graduated cylinder.

Thus, adding 35.35mL of 99% IPA **to 14.65mL** of distilled water creates a 50mL solution of 70% IPA.

This natural product is produced by **fermentation of sugars**, using yeast. The sugars are derived mainly from grain and molasses. After the fermentation process, the ethanol is purified by a multiple distillation and rectification process.

When ethanol reaches 95.6% concentration, it quits boiling separately from water, forming an azeotrope. … 200 proof alcohol means that the ethanol does not contain water. An anhydrous ethanol solution can be denatured with **95% ethanol and 5% methanol**, and it is still 200 proof.

Absolute ethanol can be diluted to an appropriate alcohol concentration by mixing at about a **4:1 product to water ratio**. A Kenei official said, “It’s ideal to dilute absolute ethanol with distilled water, but it can be diluted with tap water at home.”

TO MAKE A STANDARD SOLUTION (70%):

Dilute by **adding 1 part water to 2 parts of this 99% Isopropyl Alcohol**.

If you find only 91% isopropyl alcohol available buy it and dilute it to 70%, because the 30% water makes it more effective at killing virus. The simple way to do this is to **add 0.3 part water (three tenths) to one part 91% alcohol**.

So you should **add 286 mL of water to your litre of 90**% alcohol, to make 70% alcohol.

The steps in the ethanol production process include **milling the corn to meal**, liquefying the meal by adding water and cooking, breaking down starch into sugar, using yeast to ferment the sugar to ethanol, distilling the ethanol by boiling off and condensing it by removing residual water and finally denaturing so that …
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Isopropyl alcohol has been called the first petrochemical (IARC, 1992). It can be prepared via three different methods: **indirect hydration of propylene, direct hydration of propylene, and catalytic hydrogenation of acetone**.

“200 proof” **means 100% ethyl alcohol by volume**. “190 proof” means 95% Alcohol by volume, the remainder 5% comprised of water.

99.5%

Ethanol, 200 proof, anhydrous, =**99.5%**
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**70ml 99.8% IPA + 30ml Distilled Water = 100ml** 70% IPA
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Decon’s Pure Ethanol 200 Proof is 100% absolute (undenatured) Ethyl Alcohol that meets USP and multi-compendial specs including EP, BP, JP. Used **as a cleaner, solvent, or as a reagent**.

Alcohol By Volume: Culinary Solvent is available in 190 proof (95% ABV) and 200 proof (**100% ABV**) options. … Additionally, some state’s further restrict the availability of high proof beverage alcohol, limited to 151 proof or 75.5% ABV.

Assuming you mean with water, since ethanol is fully soluble in water, just **add water until you reach the desired concentration**. Note that the proof of drinking alcohol is twice the percentage by volume.

- This is a ratio question. Use the equation:
- Conc1 * V1 = Conc2 * v2. 75% ethanol * V1 = 20% ethanol * 300 mL.
- Rearrange solving for V1 and this yields.
- V1 = (20% ethanol/75% ethanol) * 300 mL. V1 = 80 mL.
- So, you will take 80 mL of 75% ethanol and dilute with (300–80) mL of water or 220 mL of water.

General Formula:

Therefore, you would have to add 7.5 L (2 US Gal) of **water** to the 6 L (1.6 US Gal) of 90% alcohol which would ultimately give 13.5 L (3.6 US Gal) of 40% ABV alcohol.

99% alcohol can easily be **diluted by adding water to it**. That is how they sell 70% alcohol in the drug store.

Because water molecules are polar, any liquid that does not have polar molecules—such as oil—is usually immiscible with water. Rubbing alcohol molecules **have a polar and nonpolar part**, which means they are able to form hydrogen bonds with water and therefore able to mix with it.

You can use your phone’s calculator to calculate this for you, and you can also replace the 100ml with any desired volume.

For your example, 70/96 = **0.729**, multiply this result by the volume you want; for example 100 ml = 72.9 ml of original solution, made up to 100 ml. Mix 365 ml of 96% ethanol with 135 ml of water.

You would **add enough water to 175 mL** of rubbing alcohol to make a total of 250 mL of solution.

take **785 ml** of 90% v/v ethanol, or 730 ml of 95% v/v ethanol, or 707 ml of 99% v/v ethanol; add distilled or filtered water to make up a volume of 1 litre; leave to cool and top up with water again to bring the volume back to 1 litre (mixing water and ethanol together produces a reaction whereby volume is reduced).

To replace 1 liter of 95% alcohol we have to use **1.26 liters of 75%** alcohol.

…

**This means that you have 75% of pure alcohol and 25% of water:**

…

- 0.75 x 1000 = 750 ml.
- This is the amount of pure alcohol.
- 0.25 x 1000 = 250 ml.
- This is the amount of water.

Add **350 mL** of 100 percent isopropyl alcohol to a 500 mL graduated cylinder. Ensure that the measurement is read at eye level with the meniscus, the bottom of the curved liquid, at 350 mL. Add an additional 150 mL of water to the graduated cylinder for a total volume of 500 mL, again measured at eye level.

Isopropyl alcohol can be produced via three different methods. These are the **indirect hydration of** propylene, direct hydration of propylene and catalytic hydrogenation of acetone.

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