Question

read this!
a well - written research question states the independent and dependent variables for an experiment. for example, a student investigated the effect of the deicer, magnesium chloride, on vegetation on the sides of highways. her research question was, “what is the effect of magnesium chloride solution concentration on the growth of rye grass?”

1. write a research question, using the format suggested in the read this! box, for the experiments in models 2 and 3.

alka - seltzer® and vinegar —
boiling points of alcohols —

Explanation:

For "Alka - Seltzer® and Vinegar" experiment:

The independent variable can be the amount (or concentration) of Alka - Seltzer® (or Vinegar), and the dependent variable can be the rate of gas production (or the amount of gas produced). Following the example's format, the research question should state the effect of the independent variable on the dependent variable. So we structure it as "What is the effect of [independent variable] on [dependent variable]?" For this experiment, if we take the amount of Alka - Seltzer® as the independent variable and the rate of gas production as the dependent variable, the research question is "What is the effect of the amount of Alka - Seltzer® on the rate of gas production when reacting with Vinegar?"

The independent variable can be the type of alcohol (e.g., methanol, ethanol, isopropanol) or the molecular weight of the alcohol, and the dependent variable is the boiling point of the alcohol. Using the example's format, we frame the research question to ask about the effect of the independent variable on the dependent variable. So the research question is "What is the effect of the type (or molecular weight) of alcohol on its boiling point?"

Answer:

What is the effect of the amount of Alka - Seltzer® on the rate of gas production when reacting with Vinegar?

For "Boiling Points of Alcohols" experiment: