Unit 4 Review!!!!

1. Unit 4 Review!!!!

2. Starting Easy…..Balance the following reactions. • Rb + RbNO3 Rb2O + N2 • H3PO4 + Mg(OH)2 Mg3(PO4)2 + H2O • Aluminum hydroxide + Carbonic acid  Aluminum carbonate + water Al(OH)3 + H2CO3 Al2(CO3)3 + H2O 10 2 6 2 3 6 2 3 6

3. Identify the different types of Reactions (synthesis, decomposition, single displacement, double displacement) • 2H2 + O2 2H2O Synthesis 5. HCl + NaOH  NaCl + H2O Double Displacement 6. HNO3  H20 + O2 + NO2 Decomposition 7. K + B2O3  K2O + B Single Displacement

4. Predict the Products of the following reactions! • Ca(OH)2 + HNO3 CaOH + HNO3 CaNO3 + H2O 9. NaClO3 (heated)  NaClO3  Na + ClO3 • Sodium + Chloride  Na + Cl  NaCl

5. Phase Notation….Write out the chemical formulas and balance the equation including phase notations (solid, liquid, gas, aqueous) • Iron metal + oxygen gas  Iron(III)oxide solid 4Fe(s) + 3O2(g)  2Fe2O3(s) • Hydrogen gas + nitrogen gas  ammonia (NH3) gas 3H2(g) + N2(g)  2NH3(g) 13. Nitric acid solution (HNO3)  water + oxygen gas + nitrogen dioxide gas 4HNO3(aq)  2H2O(l) + O2(g) + 4NO2(g)

6. Reactivity Series…. Answer the following questions using the activity series chart • Would the following reaction occur: Mg + Zn(NO3)  ? • Yes! Mg is higher on the chart than Zn (meaning Mg is more reactive than Zn) • Would the following reaction occur: Al + NaCl  ? • No! Aluminum is lower on the chart than Na (meaning Al is less reactive than Na) • What is the most reactive halogen? • Fluorine!

7. Stoichiometry! Determine the amount of unknown quantities in each question! Use your STOICH-ED sheet for help! • How many grams of calcium carbonate are required to prepare 50.0g of calcium oxide? CaCO3 CaO + CO2 X g 50.0 g