Blog

How do we read the liquid level in a volumetric measuring device in which a solution forms a meniscus?

Rubber safety bulb are used along with pipets to measure a more precise volume than that of a graduated cylinder.

Suppose a 1.0mL air bubble is trapped in the tip of your buret and you don’t notice it before measuring out liquid samples with the buret. What percentage error would be introduced in a 35.0mL sample of liquid if the air bubble comes out of the tip of the buret while the liquid sample is being transferred?Hint: % Error=observed- acceptedaccepted×100

Pipets used for the transfer of samples of solutions are always rinsed with a small portion of the solution to be dispensed with the pipet before the actual sample is taken. Calculate the percentage error likely to arise in an experiment if a 10mL pipet is used for transfer and contains 5 drops of liquid adhering to the inside of the barrel. Assume a volume of about 0.05 mL per drop.  Hint:  %   E r r o r = o b s e r v e d –   a c c e p t e d a c c e p t e d × 100 Answer: [BLANK-1]% error

Stamped by the manufacturer on a volumetric pipet is the notation, “TD 25mL.” Explain what this means.

You have the following medication order:  Bumetanide 0.75mg IM once Supply on hand: Bumetanide vial 1mg/4ml 1. Indicate how much volume (ml) you will inject 2. Based on your answer for #1, which area will you inject the medication into

Please indicate the correct military time for 10:06pm

You have the following IV infusion order:  cefazolin 500 mg IV PB diluted in 50ml D5W to infuse in 15 mins. drop factor: 15 gtt/ml   Your flow rate is .         gtt/min 

4 tablespoons (tbsp) is equal to            ml’s

5 mls is equivalent to           teaspoon (tsp)