Skip to content

Tag Archives: Lab techniques

Lab documentation

During the semester you will be asked to develop various aspects of your scientific record keeping and report writing. These talents will hopefully be expanded and built upon during subsequent chemistry and other science lab courses. The exact documentation requested for each laboratory exercise is explained at the end of each experimental write-up. Preparation for […]

Micropipette

During the semester you will make use of Pipetman® micropipettors.  When used properly, these units deliver very accurate volumes (errors less than 1%) and they are amazingly fast.  However, please recognize that micropipettors will give erroneous volumes when in the hands of someone who is careless or not operating them correctly.  Some important suggestions/comments for […]

Titration

Besides mass measurements, bureting/pipetting are the other techniques that you will frequently be doing in the laboratory.  A titration is the gradual addition of a known volume of one reagent (the titrant) to another reactant until the observed completion of a chemical reaction.  Typically, an indicator is employed to signal the complete consumption of the […]

Analytical Balance

Weighing a sample on a modern analytical balance is one of the most common measurements in a chemistry laboratory.  Almost all of the analytical balances are electronic where the gravitational force of the sample is balanced by a magnetic force generated by an electromagnet. The current needed to maintain the position of the weighing pan […]

Lab safety

by K. Jewett and S. Sontum (with edits by R. Sandwick) Emergency Procedures Accidents: In case of an accident in the laboratory, notify your laboratory instructor immediately and have someone accompany injured persons to the infirmary. All accidents must be reported to the laboratory instructor. Acid/Bases:  The best treatment for acid or base in your eyes […]