In this activity, student mix a given quantity of salt with a fixed volume of water. Mass and volume measurements are made before and after mixing to determine if these quantities change. Students observe that mass is conserved during dissolving while volume is not.
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Burning fossil fuels releases carbon dioxide, CO2(g), which contributes to the greenhouse effect and hence to climate change. Burning some fossil fuels also releases nitrogen oxides and sulfur... read more
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Categories: Lab/Student Activity, Teacher Demonstration
This demonstration/activity involves the safe production of oxygen, hydrogen, and carbon dioxide gases, as well as the appropriate results for tests used to identify these gases. read more
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Categories: Lab/Student Activity
This activity illustrates the effect of intermolecular forces on surface tension of a liquid. Students attempt to place drops of various types of liquids on the face of a penny (or any available... read more