Can someone help me with these calculations:
1) The recommended limit for safe exposure to sulfur dioxide in the air is 0.000025%. What is the concentration in parts per million,ppm?
The answer is B can someone please explain why
2)Sodium thiosulfate was used to determine the concentration of iodine by titration
The sodium thiosulfate solution was prepared by dissolving 4.5g of sodium thiosulfate in water and making the solution up to 250cm3 in a volumetric flask. The volumetric flask is accurate to +-0.3cm3 so to match this accuracy the mass of the sodium thiosulfate should be accurate to at least
the answer is C can someone explain why please
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- Thread Starter
- 10-02-2018 14:04
- Official Rep
- 12-02-2018 16:16
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- Section Leader
- 12-02-2018 16:18