58 938
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Physical Chemistry Question for Nhat

Question #32097
In atomic absorption spectroscopy, how to prepare standards of iron (ii) to acquire 2, 4, 6, 8 and 10 parts per million? This is to test the concentration of iron in water
Expert's answer
2 ppm is 2 µg/ml, 4 ppm is 4 µg/ml, etc. You can take standard of iron with concentration, for example, 10 mg/L. From this solution you extract 20 ml and dilute them with 80 ml of water. And you will prepare 100 ml of standard with concentration 2 ppm. For 4 ppm you take 40 ml and dilute with 60 ml of water. For 6 ppm you take 60 ml of 10 mg/L solution and add 40 ml of water. For 8 ppm you take 80 ml and add 20 ml of water. And for 10 ppm you just take your initial solution with 10 mg/L.
You can prepare initial solution by dissolving 1,27 g of FeCl2, in 1 L of water.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question