Rates in the Lab

Part of the Food Chemistry and the Lab section of Coddy's Chemistry journey. Lesson 24 of 27.

Rate = change / time: gas volume, mass lost, or time to turn cloudy.

Marble in acid gives off CO₂ fastest at the start, then slows as the acid is used up.

Higher temperature, smaller pieces, more concentrated acid and a catalyst speed it up. A catalyst lowers the activation energy.

Challenge

Marble chips react with hydrochloric acid and $60\ \mathrm{mL}$ of carbon dioxide is collected in the first $30\ \mathrm{s}$ . What is the average rate r of the reaction, in mL/s?

Try it yourself

Solve for $r$

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Food Chemistry and the Lab

1Carbohydrates

Sugars Glucose and Fructose Starch and Cellulose Recap - Sugar Detective

4Food Energy and Additives

Energy in Food Vitamins Preservatives and pH Recap - Food Label

7Practice Problems

Recap - Fat in Chips Recap - Vitamin C Titration

2Fats and Oils

Fatty Acids Saturated and Unsaturated Triglycerides and Esters Recap - Oil or Fat

5Laboratory Skills

Lab Safety Measuring Mass and Volume Making a Solution Separating Mixtures Recap - Lab Notebook

3Proteins

Amino Acids Peptide Bonds Denaturing Proteins Recap - Protein Builder

6Experiments

Titration in the Lab Tests for IonsRates in the LabRecap - Mystery Powder