Innovating Science® - Le Chatelier's Principle

Manufacturer No
80 % of 100
Add to Wish List

Chemical products can only be purchased by Corporations and Educational Institutions. Private Individuals are not eligible.
Chemical purchases under $50 requires an additional $10 handling fee.

Manufacturer ID - IS8004

Students will learn about acids and bases through a class discussion and then test a dilute acid and dilute base with neutral litmus paper to learn how the paper indicates something is acidic or basic. Once that skill is learned they can move on to test some common items that would be found around their house to determine if they are acids or bases. Optional: Extra litmus paper is included to test more items either from home or around the school building for a greater understanding of acids and bases. The activity contains enough materials for 6 groups of students.

Safety Data Sheet

Le Chatelier's Principle is a qualitative rule, which allows the prediction of the effect of temperature, pressure and concentration changes on chemical reactions. The principle states: A chemical system at equilibrium when stressed by external forces will adjust in such a way as to minimize that stress. For example when a system is subjected to increased pressure it adjusts so that it will occupy less volume. This offsets the pressure increase. If ice is placed under an increased pressure, it melts because the water obtained from a given mass of ice occupies less volume. In the formation of ammonia (the Haber process) from hydrogen and nitrogen, the product of the reaction (NH3) occupies less volume than the two uncombined gases. The increase in pressure favors the production of ammonia.

This experiment is divided into three separate reactions demonstrating how different types of stress effect equilibrium. Students are asked to predict the outcome of each situation and then prove or disprove their predictions.

Kit Includes:
1 X 25mL Bromothymol Blue pH Indicator Solution, 0.04%
1 X 10g Potassium Thiocyanate Crystal
1 X 25mL Ferric Nitrate Solution, 0.2M
1 X 200mL Potassium Thiocyanate Solution, 0.002M
1 X 10g Sodium Phosphate, dibasic
1 X 25mL Concentrated Hydrochloric Acid, 36%

2 X 25mL Sodium Hydroxide Solution, 0.1N
1 X 50g Sodium Chloride

DOT Info:
Small quantity exemption 173.4
THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only
Brand Name
Innovating Science®
Performance Expectations 5-PS1-3
Cross Cutting Concepts Cause and Effect
Scale, Proportion, and Quantity
Engineering Practices Planning and Carrying Out Investigations
Box Used 12663SBOX
Width (in) 6.25
Height (in) 4
Weight (oz) 19.9
Weight (lb) 1.24
Country of Origin US
Harmonization Code 9023.00.0000
DOT Description Non regulated

Customer Reviews

Be the first to review this product

of customers recommend this product

5 Stars
0 %
4 Stars
0 %
3 Stars
0 %
2 Stars
0 %
1 Star
0 %
Write Your Own Review
Only registered users can write reviews. Please Sign in or create an account