Oquizy

In an experiment to investigate how temperature affects the rate of reaction, which is the independent variable?

Temperature of solution Time measured Type of acid used Volume of gas produced

Which of the following suggests a pure substance?

Boils at different temperatures each trial Changes colour before boiling Melts over a wide range Melts sharply at a fixed temperature

Rf value of an unknown spot is 0.72. Compare to reference Rf list:
Glucose: 0.50
Caffeine: 0.72
Ethanol: 0.95
What is the likely substance?

Caffeine Ethanol Glucose Mixture

Quiz: Chemistry - Experimental Chemistry