81 In order to perform a dilution, you need to transfer 3.5 ml of a salution. Sh

Question

81 In order to perform a dilution, you need to transfer 3.5 ml of a salution. Shade in the second 10ml serologica pipet to show what should be left in the pipette after you transferred the 3.5 mL (1 point) -1 S) You need to make a stock solution of Sodium Chloride You follow the protocol and mass out 150 milligrams of Sodium Chloride and dssolve it into 5 mL of water. What is the concentration of the solution you produced in mg/mL? (1 point) 10) Starting with a stock solution of 5.6 mL methylene blue at a concentration of 18 me You dilute the solution with 4.4 ml of What is the new concentration? (2 points)

Explanation / Answer

8) After pipetting out 3.5 ml of the solution from the pipette containing 10 ml of the serological solution, 6.5 ml remains in the pipette.

9) 150 mg of NaCl is dissolved in 5 ml of water. So, the concentration of the solution is,

= 150/5

= 30 mg/ml

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