a solution that has undergone a 1:100 dilution has a concentraion of .750 micromoles, what is...
You carry out a serial dilution of a bacterial culture, using dilutions of ⅕, ⅕, 1/100, and 1/10. Then you plate 100 µl of the final dilution and the next day observe 200 colonies on your plate. What was the concentration of the original culture? (5 pts)
A urine sample is diluted 1:100. 200 µl of the 1:100 dilution is spread onto an agar plate. After incubation, 250 colonies are observed. What is the concentration of bacteria in the original urine sample? Show your work and include proper units for full credit.
Dilution- 1 a) A 4 N NaOH solution was mixed with an equal volume of a 10 N NaOH. What is the concentration of NaOH in the mixture? b) Which contains more alcohol : a 1/6 dilution of 30% ethanol or a 0.08 dilution of 60% ethanol? C) You have a 0.3ml of a vitamin solution. How many ml of a 1/20 dilution will this make? Could you use the resulting 1/20 dilution to make a 1/100 dilution ? D)...
Serial Dilution Questions
1, Serial dilution Questions: a) (5 pts) Suppose you begin with stock solution of dye that has a concentration of 350.0 mg/L and do the following set of serial dilutions on it: 5.00 mL of stock diluted to a total volume (TV) of 500.00 mL (Dilution 1); 2,00 mL of Dilution 1 is then diluted to a TV of 250.00 mL (Dilution 2); finally, 1.00 mL of Dilution 2 is then diluted to a total volume of...
You come into lab and notice your lab partner did a 1:10 dilution series on a stock that you ordered. You see that the final dilution has a concentration of 0.0004 Molar and that your partner had diluted the stock seven times. What is the concentration of the original stock solution? is it 40,0000?
1. Serial dilution Questions: a) (5 pts) Suppose you begin with stock solution of dye that has a concentration of 350.0 mg/L and do the following set of serial dilutions on it: 5.00 mL of stock diluted to a total volume (TV) of 500.00 mL (Dilution 1); 2.00 mL of Dilution 1 is then diluted to a TV of 250.00 mL (Dilution 2); finally, 1.00 mL of Dilution 2 is then diluted to a total volume of 100.00 mL. Calculate...
1. What is the minimum volume to use in the Spec 20 cuvette in order to read the absorbance? a) 1.0mL b) 3.0mL c) 5.0mL d) 0.50mL 2. How many microliters (uL) of a 3.0 Msolution are required to make 750 uL of a 0.953 M solution? a) 275 uL b) 225 uL c) 258 uL d) 238 uL 3. If you make a dilution by adding 25 uL of a solution to 75 uL of water, what dilution factor...
For Experiment 2 you need to prepare a 10X dilution of a 100 mM NaCl stock solution (Mr 58.44). What is the concentration of the dilution in mg/mL?
Fill in the Blanks. - A 1:10 ration, means that the final solution has been diluted ....... fold. - If the original solution has 0.1 mole per liter and the ration is 1:5, the final concentration is ........ moles per liter. - You have a 1 molar solution and need to do a 1:5 dilution to prepare a 40ml solution. This means you need ....... ml of the original 1 molar solution for this dilution.
1 of 4 Watch the video that shows using the dilution method to make a solution of known concentration. Note that while the video shows the use of a beaker, in the lab we typically use a volumetric flask to make the diluted solution. The stock solution of KMnO, has a concentration of 2.6 10-4 M. The pipette has a volume of 10.0 mL. What is the amount of KMnO, delivered to the solution, in moles? mol X resubmit