Activity Series
Use the activity series to write balanced chemical equations for each of these single replacement reactions. If no reaction will occur, write “NR”.
1. Sn(s) + NaNO3(aq)
Answer
Sn(s) + NaNO3(aq) → NR
2. Cl2(g) + NaBr(aq)
Answer
Cl2(g) + NaBr(aq) → 2NaCL(aq) + Br2(l)
3. Cu(s) + FeSO4(aq)
Answer
Cu(s) + FeSO4(aq) → NR
Word Equations
Substitute symbols and formulas for words and then balance the following equations. Be sure to use abbreviations to denote physical states.
1. When solid potassium nitrate is heated, it decomposes to solid potassium nitrite, and oxygen gas is evolved.
Answer
2KNO3(s) → 2KNO2(s) +O2(g)
2. Solid lithium hydroxide reacts with carbon dioxide to form solid lithium carbonate and liquid water.
Answer
2LiOH(s) + CO2(g) → Li2CO3(s) + H2O(l)
Predicting Products
In a common synthesis reaction, sodium metal is lowered into a bottle of chlorine gas. Predict the product, substitute symbols and formulas for names, and then balance the equation. Be sure to use abbreviations to denote physical states.
Answer
2Na(s) + Cl2(g) → 2NaCl(s)
Aluminum sulfate and calcium hydroxide are used in a water purification process. When each is dissolved in water, they react to produce two insoluble products. Predict the products, substitute symbols and formulas for names, and then balance the equation. Be sure to use abbreviations to denote physical states.
Answer
Al2(SO4)3(aq) + 3Ca(OH)2(aq) → 3CaSO4(s) + 2AL(OH)3(s)