Pleasseee DO NOT just fill the table without showing how the calculation is made
ID: 195446 • Letter: P
Question
Pleasseee DO NOT just fill the table without showing how the calculation is made. I need a step by step calcultion showing all the steps
U2-9.Calculate the concentration reduction of the dilution according to formula (2) and complete the chart below Conc. Reduction = initial volume of starter solution : total volume of the dilution -parts of starter solution: all parts of the dilution Concentration Reduction 50:500-1:10 50 mL starting solution in a final volume of 500 mL 200 mL starting solution in a final volume of 500 mL 250 mL in 500 mL 320 L in 80 mL 2 Parts starting solution in a total of 5 Parts solution 50 mL starting solution mixed with 500 mL dilution solution 200 mL starting solution mixed with 500 mL dilution solution 250 mL with 500 mL 50:550 1:11 320 L with 80 mL 2 Parts starting solution with 5 Parts dilution solutionExplanation / Answer
200 ml starting solution in a final volume of 500 ml.
Initial volume of starter solution:total volume of the dilution= 200:500 =1:2.5
Step wise step: final volume/starting solution = 500/200 = 2.5. That means the final volume is 2.5 times of starting volume. Here the starting volume is 200, so the final volume is 200x2.5 = 500. In other words, if you consider starting volume is 1 and then the final volume is 1x2.5 =2.5. So 200:500 can be simplified in writing as 1:2.5.
Note that the starting volume will not increase the final volume because the starting volume is used to make up the final volume and not added to the final volume.
250 ml in 500 ml
Initial volume of starter solution:total volume of the dilution= 250:500 = 1.2
Step wise step: 500/250 = 2. So the final volume is 2 times of starting volume. Or, 1:2
320 µl in 80 ml
320 µl =0.32 ml. So Initial volume of starter solution:total volume of the dilution= 0.32:80 =1:250
Step wise step: 80/0.32= 250. So the final volume is 250 times of starting volume. Or, 1:250
2 Parts starting solution in a total of 5 parts solution
Parts of starter solution:all parts of the dilution= 2:5 =1:2.5
Step wise step: 5/2= 2.5. So the final volume is 2.5 times of starting volume. Or, 1:2.5
50ml starting solution mixed with 500 ml dilution solution.
Initial volume of starter solution:total volume of the dilution= 50:550= 1:11
Step wise step: Unlike the cases given above, here the starting solution is mixed with the dilution volume. So the total final volume will be the additive of starting volume+dilution volume. Here starting volume = 50 and dilution volume is 500. So final volume = 50+500 =550. Hence the ratio can be written as 50:550.
550/50 = 11. So the final volume is 11 times of starting volume. Or, 1:11.
200 ml starting solution mixed with 500 ml dilution solution.
Initial volume of starter solution:total volume of the dilution= 200:700= 1:3.5
Step wise step: starting volume = 200, dilution volume = 500. Total final volume = 200+500 =700.
700/200 = 3.5. So the final volume is 3.5 times of starting volume. Or, 1:3.5.
250 ml with 500 ml.
Initial volume of starter solution:total volume of the dilution= 250:750 =1:3
Step wise step: starting volume = 250, dilution volume = 500. Total final volume = 250+500 =750.
750/250 = 3. So the final volume is 3 times of starting volume. Or, 1:3.
320 µl with 80 ml
320 µl =0.32 ml. So initial volume of starter solution:total volume of the dilution= 0.32:80.32 =1:251
Step wise step: starting volume = 0.32, dilution volume = 80. Total final volume = 0.32+80 =80.32
80.32/0.32 = 251. So the final volume is 251 times of starting volume. Or, 1:251.
2 Parts starting solution with 5 parts dilution solution
Parts of starter solution:all parts of the dilution= 2:7 =1:3.5
Step wise step: starting volume = 2, dilution volume = 5. Total final volume = 2+5=7
7/2 = 3.5. So the final volume is 3.5 times of starting volume. Or, 1:3.5.