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A saline solution is diluted with water in the ratio 1:24. This solution is then taken and mixed with water in the ratio 1:3. How much of the original saline solution would there be in 200mL of this final solution?

 Mar 30, 2021

Best Answer 

 #1
avatar+33727 
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1:24    means there is   1 out of (1+24 =25)    or  1/25 saline in the first dilution

 

then mix this 1/25     in a ratio of 1:3     meaning   1/4    of     1/25   is now saline =  1/100 is saline

 

1/100th of 200 =  1/100   * 200 = 2 ml saline in 200 ml of the twice diluted mix .

 Mar 30, 2021
edited by ElectricPavlov  Mar 30, 2021
 #1
avatar+33727 
+2
Best Answer

1:24    means there is   1 out of (1+24 =25)    or  1/25 saline in the first dilution

 

then mix this 1/25     in a ratio of 1:3     meaning   1/4    of     1/25   is now saline =  1/100 is saline

 

1/100th of 200 =  1/100   * 200 = 2 ml saline in 200 ml of the twice diluted mix .

ElectricPavlov Mar 30, 2021
edited by ElectricPavlov  Mar 30, 2021

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