Question

what is the volume of a 70% ethyl alcohol solution in a 250ml bottle to fight covid-19 in situation #1​

Answer 1

Given:

Percentage volume of ethanol in solution = 70%

Volume of solution = 250 mL

To Find:

Volume of ethanol = ?

Step- wise solution:

• Ethanol is well-known for its antiseptic characteristics, which enable it to kill a variety of germs.
• It is a highly effective solution for killing microbes at a 70 percent concentration of ethanol.
• It has also been found to be a highly beneficial in the form of hand sanitizers and spray that minimises the likelihood of infection caused by Covid-19 being transmitted.

The volume of ethanol can be calculated from the following formula:

Volume percentage of solute = (Volume of solute ÷ Volume of solution)×100

On rearranging formula we get,

Volume of solute (mL) = Volume percentage  × Volume of solution(mL)

Volume of ethanol (mL) = (70 ÷ 100) × 250 mL

Volume of ethanol (mL) = 7 × 25 mL

Volume of ethanol (mL) = 175 mL

• Hence, the 250 mL alcohol solution contains 70% ethanol which is 175 mL by volume of ethanol.

Answer 2

Answer:

250 ml alcohol contains 70% ethanol which is 175 ml by volume of ethanol.

Explanation:

• We are given the information -

Volume of solution= 250 ml

Percentage volume of ethanol in solution= 70%

• We are asked to find the volume of ethanol.
• To solve this question, we will use the formula-

Volume percentage of solute= (volume of solute x volume of solution) x 100

Rearranging this formula-

$volume of solute= volume percentage\times volume of solution$

Volume of ethanol(ml)=$\frac{70}{100} \times 250 ml$

Volume of ethanol=$7\times 25 ml$

Volume of ethanol=$175 ml$

• Ethanol is well known for its antiseptic characteristic.
• It is highly effective solution for killing the microbes.

Hence, the volume of ethanol is 175 ml.

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