Bonus: Cobalt nitrate actually used for MS Actual MS Actual WS5.) How would you go about making a set of standards ranging from 1.0-5.0ppm for a test measuring cobalt (Co,58.933(g)/(m)ol) in natural water samples using cobalt nitrate (Co(NO_(3))_(2),182.94(g)/(m)ol) ? Assume you will need 100mL of working stock. Target working stock] in ppm (mg/

Question

Bonus: Cobalt nitrate actually used for MS Actual

MS

Actual

WS

5.) How would you go about making a set of standards ranging from

1.0-5.0ppm

for a test measuring cobalt

(Co,58.933(g)/(m)ol)

in natural water samples using cobalt nitrate

(Co(NO_(3))_(2),182.94(g)/(m)ol)

? Assume you will need

100mL

of working stock. Target working stock] in ppm (mg/L): Mass of cobalt nitrate needed for working stock: Mass of cobalt nitrate weighed out: [master stock] in ppm

(m(g)/(L)):

Number of 1:10 dilutions to go from master stock to working stock: Bonus (

+5pts

): Assuming

0.3096g

of cobalt nitrate was weighed out, fill in the table with the actual concentrations of the standards, if they were made in

50mL

volumetric flasks.

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