Checking understanding of chemical reactions and equations

5 questions

Students are assessed on balancing equations, reaction types, predicting products and state symbols.

Questions

1. Which of the following is a correctly balanced chemical equation?
2. In a chemical reaction, the total mass of the reactants must equal the total mass of the products.
3. When magnesium reacts with oxygen to form magnesium oxide, what type of reaction is this?
4. What are the products of the reaction between aqueous sodium sulfate (Na₂SO₄) and barium chloride (BaCl₂)?
5. Which option correctly shows the states of matter for the reaction: 2H₂(g) + O₂(g) → 2H₂O(l)?