Chroom standaard oplossing
chemische formule: 1. 2.829 g K2Cr2O7 / l H2O
2. 1 g Cr / l 2 to 5% HCl
3. 1 g Cr / l 2 to 5% HNO3
4. 10 g Cr / l 2 to 5% HCl
5. 10 g Cr / l 2 to 5% HNO3
6. 7.696 g Cr(NO3)3.9H2O / l H2O
7. 5.124 g CrCl3.6H2O / l 2 to 5% HCl
8. 7.696 g Cr(NO3)3.9H2O / l 2 to 5% HNO3
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