MTEL Chemistry case studies
MTEL Chemistry · Put your knowledge to work in context.
The Chemistry test is one of the subject-matter assessments listed among the Massachusetts Tests for Educator Licensure (MTEL) fields on the official MTEL program website. Candidates typically take a subject-matter MTEL to demonstrate the content knowledge Massachusetts requires for an academic license in that field, so the Chemistry test is aimed at prospective chemistry teachers rather than at candidates seeking the Communication and Literacy Skills requirement. The MTEL Chemistry case studies are 5 cases and about 2,632 words.
1Combustion Analysis and the Missing Factor of Two
Alvarez is reviewing a lab report from a student who analyzed an unknown liquid containing only carbon, hydrogen, and oxygen. The student burned a 0.500 g sample in excess oxygen and collected 0.733 g of CO2 and 0.300 g of H2O.
586 words, about 3 min2A Galvanic Cell That Reads Low
A group of students constructs a galvanic cell with a zinc electrode in 0.10 M Zn(NO3)2 and a copper electrode in 0.10 M Cu(NO3)2, connected by a potassium nitrate salt bridge. At 22 °C, the voltmeter reads 1.02 V.
491 words, about 2 min3When Bubbling Stops: Equilibrium or Limiting Reagent?
During a demonstration, a student adds 5.00 g of solid sodium bicarbonate to 100.0 mL of 1.00 M acetic acid at 25 °C. The mixture bubbles vigorously, then the bubbling stops after several minutes.
508 words, about 3 min4Two Equivalence Points but One Indicator
A student titrates 0.250 g of an unknown solid acid with 0.100 M NaOH. The acid dissolves in 50.0 mL of distilled water.
519 words, about 3 min5Calorimetry: When a Good Agreement Is Misleading
A student mixes 50.0 mL of 1.00 M HCl with 50.0 mL of 1.00 M NaOH in a coffee-cup calorimeter. Both solutions are initially at 22.0 °C.
528 words, about 3 min