Teb: Qhov ntim ntawm decinormal K2Cr2O7 tov uas yuav xav tau los hloov 1.19 g ntawm tin rau stannic chloride nyob rau hauv nruab nrab acidic yog 400 ml.
N yam ntawm k2 cr2 o7 yog dab tsi?
Potassium dichromate nyob rau hauv nruab nrab acidic yog ib qho muaj zog oxidizer. Nws txhais tau tias nws tau txais electrons thaum lub sij hawm redox cov tshuaj tiv thaiv. Muaj tag nrho qhov nce ntawm 6 electrons. Qhov ntawd txhais tau tias n-factor rau cov tshuaj tiv thaiv no yog 6.
Dab tsi yog qhov normality ntawm potassium dichromate?
Potassium Dichromate, 0.025 Ib txwm, Qhov Tseeb Tseeb=0.0245 - 0.0255, Aqueous Solution.
Koj ua 1 N K2Cr2O7 li cas?
Standardization ntawm 0.1 N Potassium dichromate (K2Cr2O7) Solution
- Muab 40 ml dej rau hauv 250-mL iav-stoppered conical flask. …
- Ntxiv 40 mL, ntsuas kom raug, ntawm K2Cr2O7 kua. …
- Ntxiv 3 g ntawm poov tshuaj iodide (KI), 2 g ntawm sodium bicarbonate (NaHCO3), thiab 5 mL ntawm hydrochloric acid (HCl).
Koj suav li cas li qub?
Ntau yam Formula
- Normality=Number of gram equivalents × [volume of solution in liters] -1
- Number of gram equivalents=luj ntawm solute × [Equivalent weight of solute]-1
- N=Luj ntawm Solute (gram) × [Sib npaug hnyav × Volume (L)]
- N=Molarity × Molar mass × [Equivalent mass -1
