Equations Review

Equations Review

A _________ is a substance that speeds up a chemical reaction without being permanently consumed in the reaction.

catalystList the naturally occurring diatomic molecules.H2, O2, N2, Cl2, Br2, I2, F2Using collision theory, EXPLAIN why increasing the temperature of a reaction increases the reaction rate?

Increasing the temperature also increases the kinetic energy of the reacting molecules. So molecules are moving faster and will collide more often. More collisions = faster reaction rate!_____________ is the speed of the disappearance of a reactant or the rate of the appearance of a product in a chemical reaction.

Reaction rateEquations must always be balanced because a certain law of chemistry cannot be violated. What is the name of the law that cannot be violated?Law of Conservation of MatterThe arrow between the reactants and products means__________.

yieldsList the four indicators that a chemical reaction occurred.Heat/lightPrecipitateGas (bubbles)Color changeIn a chemical equation, what is indicated by the symbol?

Heat is added to the reactionIn a chemical equation, what is indicated by the symbol?

A precipitate is formedWhat are the 4 factors that affect the reaction rate?TemperatureConcentrationNature of ReactantsCatalystList the reactants in the following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

CH4 + 2O2Using collision theory, EXPLAIN why increasing the concentration of a reactant increases the reaction rate?

More molecules are present as the concentration is increased. So more molecules present equals more collisions between reacting molecules. More collisions = faster reaction rate!In a chemical equation, what is indicated by the H2SO4 symbol?

That H2SO4 was used as a catalyst is this reaction List the products in the following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

CO2 + 2H2OHow many atoms of O are in 2H2O following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

2What is does the represent in the following equation: 2H2 + O2 2H2O

A reversible reaction. The reaction can go both ways- reactants yield products and product can yield reactantsWhat type of reaction would the following be classified as?AB + CD AD + CBDouble displacementSuppose in the following reaction that 10g of Mg was added to 14g of O2, how many grams of MgO would be produced?2Mg (s) + 2O2 (g) 2MgO (s)

24 g b/c the Law of Conservation of Matter (the amount of matter you start with is the same amount that you end with!)How many atoms of C are in CO2 following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

1How many moles of CH4 are present following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

1What ions are present for H20?H+ and OH-How many molecules of 2O2 are present following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

2Which of the following substances would be a gas that is produced in the following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

CO2What type of reaction would the following be classified as?A + B ABSynthesisWhich type of reaction has only one REACTANT?DecompositionWhat type of reaction would the following be classified as?A + BC AC + BSingle displacement

Which of the following substances would be a liquid in the following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

2H2OHow many molecules of CH4 are present following equation:CH4 (g) + 2O2 (g) CO2 + 2H2O (l)

1What ion is ALWAYS present in any acid?H+Which type of reaction has only one PRODUCT being produced?SynthesisWhat does (aq) represent after a substance?Aqueous substance was dissolved in waterIs the following reaction correct? Explain.2Mg (s) + 2O2 (g) 2PbO (s)

NO! b/c the Law of Conservation of Matter (the same types of atoms must be present on both sides of the equation. Mg cant be changed into Pb!What type of reaction would the following be classified as? AB A + BDecompositionBalance the following equation:

potassium + water potassium hydroxide + hydrogen

2K + 2H2O 2KOH + H2Balance the following equation: fluorine + aluminum oxide aluminum fluoride + oxygen 6F2 + 2Al2O3 4AlF3 + 3O2Identify the type of reaction. Finish the word equation & write the balanced equation:

Aluminum + hydrochloric acid Single Displacement Aluminum chloride + hydrogen2Al + 6HCl 2AlCl3 + 3H2Identify the type of reaction. Finish the word equation & write the balanced equation:

calcium fluoride + water Double Displacement Calcium hydroxide + hydrogen fluorideCaF2 + 2H2O Ca(OH)2 + 2HFIdentify the type of reaction. Finish the word equation & write the balanced equation:

potassium oxide Decomposition potassium + oxygen2K2O 4K + O2Identify the type of reaction. Finish the word equation & write the balanced equation:

strontium + chlorine synthesisStrontium chlorideSr + Cl2 SrCl2*Balanced