Friday
April 18, 2014

Homework Help: chemistry

Posted by Brooke on Tuesday, April 2, 2013 at 7:09am.

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!

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