Question
Asked Nov 29, 2019
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In this experiment it takes about 10 microliters of solution to produce a spot 1 cm in diameter. If the Co(NO3)2 solution contains about 6 g Co2+ per liter, how many micrograms of Co2+ ion are there in one spot?

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Expert Answer

Step 1

Different units are used to express the volume and mass of substances such as grams, micrograms, liter, microliters etc. The dimension analysis is used to convert one unit to another with the help of conversion factors.

Step 2

Convert μL to L:

1L  = 106 μL  

1L
-=10L
10uL
10uLx
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1L -=10L 10uL 10uLx

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Step 3

Convert g to μg

1g  = 106...

10°ug
6 g x
-6x10°4g
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10°ug 6 g x -6x10°4g

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