"Ward's Science"

Learn about the different pigments in plant material and how chromatography can help to separate molecules in a mixture.

Hands On Science For Elementary Students!

CAS Number: 50-78-2
Formula Weight: 180.16
Formula: 2-CH₃COOC₆H₄COOH
Density (g/mL): 1.35
Boiling Point (°C): Decomposes
Freezing Point (°C): 135
Solubility: Alcohol and Chloroform
Synonyms: Salicylic Acid Acetate, Aspirin, 2-(acetyloxy)-Benzoic acid
Shelf Life (months): 12
Storage: Green

Learn about how to test for the presence of blood on materials.

CAS Number: 75-09-2
Formula Weight: 84.93
Formula: CH2Cl2
Hazard Info: Suspected Human Carcinogen
Boiling Point (°C): 40
Freezing Point (°C): -95
Solubility: Alcohol
Synonyms: Dichloromethane
Shelf Life (months): 36
Storage: Blue

CAS Number: 7775-11-3
Formula Weight: 161.99
Formula: Na2CrO4
Hazard Info: Toxic
Density (g/mL): 2.723
Freezing Point (°C): 792
Solubility: Water and Alcohol
Synonyms: Disodium Chromate(VI), Chromate of Soda
Shelf Life (months): 36
Storage: Blue

CAS Number: 1308-38-9
Formula Weight: 152.02
Formula: Cr₂O₃
Hazard Info: Toxic
Density (g/mL): 5.1
Boiling Point (°C): 4000
Freezing Point (°C):

Meets AP Science Practices 1, 2, 4, 5, and 6

Demonstrates the Effects of Acid Rain

Biomedical Engineering in the Classroom.

CAS Number: 7789-12-0
Formula Weight: 298.05
Formula: Na2Cr2O7·2H2O
Hazard Info: Toxic, Corrosive
Density (g/mL): 2.348
Solubility: Water
Synonyms: Sodium Bichromate
Shelf Life (months): 12
Storage: Blue

The activities in this kit focus on developing a better understanding of why periodic trends occur in the elements.

Stoichiometry for AP Chemistry

CAS Number: 12230-71-6
Formula Weight: 315.48
Formula: BaOH2·8H2O
Density: 2.18 gg/mL
Solubility: Water, Alcohol and Ether
Synonyms: Barium Hydrate, Barium Octahydrate
Shelf Life: 12 Months

With stiff 'arms' radiating in all directions, these microscopic organisms look like sea urchins

Mixed genera. Also known as scuds, amphipods are freshwater crustaceans.