in the preparation of the standard Beer's law curve, 5.00 mL, 10.00 mL, 15.00 mL and...
in the preparation of the standard Beer's law curve, 5.00 mL, 10.00 mL, 15.00 mL and 20.00 mL of a 0.108 M stock solution of glucose were added to separate 50 mL volumetric flasks.
Afterwards, each of the flasks was filled to the mark with distilled water and labelled A, B, C and D accordingly.
What is the concentration of glucose in the flask C? Report your answer to 3 decimal places.
Homework Answers
Concentration of stock solution of glucose = 0.108 M = 0.108 mol /L
- 5.00 mL, 10.00 mL, 15.00 mL and 20.00 mL of stock solution were added to separate 50 mL volumetric flasks, and each of the flasks was filled to the mark with distilled water and labelled A, B, C and D accordingly.
- What is the concentration of glucose in the flask C ?
Flask C : -15.00 ml of stock solution of glucose
- Final volume = 50 ml
- Concentration of stock solution = 0.108 mol /L
Moles of glucose in the flask C = (0.108 mol /L ) * 15.00 ml / (1000 ml / L ) = 0.00162 moles
Concentration of glucose in the flask C = 0.00162 mole * (1000 ml /L) / (50 ml )
= 0.032 mole /L or 0.032 M
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