1. R

    Dihydrazine Sulphate

    Can I add hydrazine sulphate into water and add soda ash(Na2CO3) to prepare dihydrazine sulphate?
  2. B

    Spectroscopy of Copper Sulphate

    Hi Everybody, I scanned 5 concentrations of copper (II) sulphate using a spectrophotometer. The concentrations I used are from 0.06 to 0.3 molar. I get two peaks in absorbance. Why are there two peaks? Also, the peak at 290nm has a variation in its maximum wavelength. This is what I am...