Chemistry chapter 8.1 HW assessment balancing equations

Formula Equation

represents reactants and products of a chemical reaction by their symbols or formulas

Indicators

- The releasing or absorbing of energy - The production of gas (bubbles) - Precipitate- a creation of a solid (usually a powder) that - - was created by two solutions - A change in color - not always reliable

The reaction of Vanadium (II) oxide with Iron (III) oxide results in the formation of Vanadium (V) oxide and Iron (II) oxide. Write the balanced Equation

2VO + 3fe2O3 --> V2O5 + 6FeO

write the word, formula, chemical equations for the reaction between hydrogen sulfide gas and oxygen gas that produces sulfur dioxide gas and water vapor.

Word Equation: Hydrogen Sulfide + oxygen --> Sulfur Dioxide + Water Vapor Formula Equation: H2S(g) + O2 (g)--> SO2(g) + H2O (g) Chemical Equation: 2H2S(g) + 3O2 (g)--> 2SO2(g) + 2H2O (g)

Coefficient

a small whole number that appears in front of a formula in a chemical equation

The difference between word equations, formula equations, and chemical equation

a) word equation- is qualitative; it uses words to represent the reactants and products in a chemical reaction b) a formula equation- is also qualitative; it uses chemical symbols or formulas, but does not reveal the rations of the reactants and products. c) chemical equation- is a balanced formula

write word and formula equations for the reaction in which aqueous solutions of sulfuric acid and sodium hydroxide reacts to form aqueous sodium sulfate and water

a) word equation: Sulfuric acid + sodium hydroxide --> Sodium sulfate + water b) formula equation: H2SO4 (aq) + NaOH (aq) --> Na2SO4 (aq) + H2O

Translate the following chemical equations into sentences a. 2K (s) + 2H2O (l) --> 2KOH (aq) + H2 (g) b. 2Fe (s) + 3Cl2 (g) --> 2FeCl (s)

a. Solid Potassium metal reacts with liquid water to form aqueous Potassium hydroxide and hydrogen gas b. Solid iron metal reacts with chlorine gas to produce solid iron (III) chloride

Chemical Equation

represents using symbols and formulas that identifies the relative molecular or molar amounts of the reactants and products in a chemical reaction

Word Equation

use the chemical words instead of symbols for both the reactants and product