Search results
Chem 12 Practice Worksheet - Answer Key Key page 1 Redox #1 (KEY) 1. Explain the meaning of each of the following terms: a) oxidation a half-reaction that involves the loss of electron(s) b) reduction a half-reaction that involves the gain of electron(s) c) reducing agent a species that causes another to be reduced; it itself is oxidized
the equation. a) aluminum reacts with iron (III) oxide (This is how iron is extracted from iron ore. It is heated at a high temperature with aluminum present. In the reaction, iron is separated from the iron ore producing a new aluminum compound.) 2Al + Fe. 2. O. 3. 2Fe + Al. 2. O. 3. b) sodium reacts with water (This reaction is dangerous.
20 − 7 = 13 g must precipitate out of the solution. Answers of 13 ±1 g are acceptable. CHAPTER 2 1 Element Compound Mixture ... group and would react in a completely different way. For example, potassium would be in Group 0 with the noble ... Empirical formula is C 2H 5Br 8 a The mass of oxygen is 2.84−1.24 = 1.60 g P O
Worksheet # 4 Balancing Redox Reactions Balance each of the following half-cell reactions. (In each case assume that the reaction takes place in an ACIDIC solution.) Also, state whether the reaction is oxidation or reduction. 1. S 2 O 3 2- → SO 4 2-2. MnO 4 - → Mn2+ 3. As → AsO 4 3-4. Cr3+ → Cr 2 O 7 2-5. Pb2+ → PbO 2
Iron reacts with sulfuric acid (H2SO4) to form iron(II) sulfate and hydrogen gas. A nitrogen containing carbon compound, C2H6N2, decomposes to form ethane, C2H6, and nitrogen gas. Phosgene, COCl2, is formed when carbon monoxide reacts with chlorine gas. Manganese(II) iodide decomposes when exposed to light to form manganese and iodine.
What mass of potassium can react with 4.0 g of oxygen? 4K + O 2 → 2K 2O moles O 2 = !"##!! = !.!!" = 0.125 mol ... FeWhat mass of iron can be made from 20 kg of iron(III) oxide? 2O 3+ 3CO →2Fe + 3CO 2 moles Fe 2O ... Shows suitable working Can use reacting ratios in equations Can find water of crystallisation
Write the chemical equations and balance each of the following word equations. a) Aluminum metal reacts with iron (II) oxide powder to produce aluminum oxide solid and iron metal.
