1. Digital burettes are based on a syringe design. 2. Burette can be held by methods suggested below.3. Burette will be put between the rubber knob.4. The known solution should then be allowed out of the burette , into the conical flask. 5. The burette concentration of a reactant not present in the burette is taken to be zero. 6. The burette concentration of a reactant not present in the burette is taken to be zero. 7. The burette contains slightly acidulated water with a trace of chemical indicator ( typically methyl orange ) for colouration. 8. Fix the burette on a stand, squeeze the handle, rubber knob will then separate from each other. 9. :Turing to an acid base titration with the acid in the burette and the base in the conical flask. 10. Stopcocks are often parts of laboratory glassware such as burettes , separatory funnels, Schlenk flasks, and columns used for column chromatography. 
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