posted by Brooke on .
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution?
A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the Erlenmeyer flask. I get incorrectly low.
A student blew the last drops of solution from the pipet into the volumetric flask when transferring commercial bleaching solution to the flask. I get no effect.
A student began a titration with an air bubble in the buret tip. The bubble came out of the tip after 5 mL of Na2S2O3 solution had been released. I get incorrectly high.
Are these correct because this kind of question confuses me. Thank you!