There are 20 % concentration of alcohol in 5 L solution of alcohol and water. 2 L of the solut

Name: Problem 51, Chapter 2: CUET UG : Section I and Section III Exam 2024 (English Edition) - 20 Practice Tests (1000 Solved Questions) with Free Access to Online Tests
Uploaded: 2021-06-26T09:24:00-08:00
Duration: 4 min 57 s
Channel: Kartik Indoliya
Description: There are 20 % concentration of alcohol in 5 L solution of alcohol and water. 2 L of the solution is replaced with 2 L water. Find the concentration of alcohol in a new solution. (a) 10 % (b) 12 % (c) 15 % (d) 18 %

step 1 First of all, let's have a look what all is given in a problem. Total volume. Total volume equal

Question

There are $20 \%$ concentration of alcohol in $5 \mathrm{~L}$ solution of alcohol and water. $2 \mathrm{~L}$ of the solution is replaced with $2 \mathrm{~L}$ water. Find the concentration of alcohol in a new solution. (a) $10 \%$ (b) $12 \%$ (c) $15 \%$ (d) $18 \%$

   There are $20 \%$ concentration of alcohol in $5 \mathrm{~L}$ solution of alcohol and water. $2 \mathrm{~L}$ of the solution is replaced with $2 \mathrm{~L}$ water. Find the concentration of alcohol in a new solution.
(a) $10 \%$
(b) $12 \%$
(c) $15 \%$
(d) $18 \%$

CUET UG : Section I and Section III Exam 2024 (English Edition) - 20 Practice Tests (1000 Solved Questions) with Free Access to Online Tests

EduGorilla Prep… 1st Edition

Chapter 2, Problem 51

Instant Answer

Solved by Expert Kartik Indoliya

06/26/2021

Step 1

Since the concentration is 20%, that means there is 20% of 5L = 1L of alcohol. When we remove 2L of the solution, we are also removing 2L * 20% = 0.4L of alcohol. So, we are left with 1L - 0.4L = 0.6L of alcohol in the solution. Show more…

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There are $20 \%$ concentration of alcohol in $5 \mathrm{~L}$ solution of alcohol and water. $2 \mathrm{~L}$ of the solution is replaced with $2 \mathrm{~L}$ water. Find the concentration of alcohol in a new solution. (a) $10 \%$ (b) $12 \%$ (c) $15 \%$ (d) $18 \%$

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Key Concepts

Percentage Concentration

This concept involves the proportion of a solute present in a solution, typically expressed as a percentage. It represents how much of the solution's volume or mass is composed of the solute, and understanding this is crucial for quantifying the strength or dilution of any solution.

Dilution

Dilution refers to the process of reducing the concentration of a solute in a solution, commonly by adding more solvent. Mastery of dilution requires understanding how the total quantity of the solute remains constant when only the volume changes, affecting the overall concentration.

Replacement in Mixtures

This involves a specific form of dilution where a certain volume of a mixture is removed and replaced with another substance, often a solvent. The technique requires calculating the amount of solute removed with the extracted portion and then determining the new concentration after the replacement.

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