Chemical equations

Which of the following signs may indicate a chemical reaction? change in color production of heat and light production of a precipitate production of a gas

ALL OF THESE MAY INDICATE A CHEMICAL REACTION.

Which of the following are the spectator ions in the following chemical reaction? NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq)

Na+, NO3-

What is the coefficient of O2 once the following formula equation is balanced? NH3(g) + O2(g) NO(g) + H2O(g)

The coefficient is 5

A synthesis reaction always produces a compound.

True

A synthesis reaction involving two nonmetals may produce different compounds.

True

In single-replacement reactions, a metal will replace a less active metal from a compound in solution.

True

Ionic compounds dissolved in H2O will dissociate into positive and negative ions.

True

Most decomposition reactions occur only after heat or electricity is applied.

True

Referring to the activity series helps to determine if a metal will displace another metal in a single replacement reaction.

True

To balance a chemical reaction, it is necessary to adjust coefficients in front of the formulas of reactants and products.

True

What is the coefficient for the following formula equation? ___Fe2O3 + ___C ___Fe + ___CO2

What is the coefficient for the following formula equation? __2_Fe2O3 + __3_C _4__Fe + _3__CO2 2; 3; 4; 3

When an electric current is applied to water, it is known as a(n) ______ reaction and forms the products ______ and

When an electric current is applied to water, it is known as a(n) _electrolysis_ reaction and forms the products _2H2__ and _O2_.

chemical equation

describes the relative molecular amounts of the reactants and products in a chemical reaction

balanced equation

equation indicating the same number of atoms of each element in reactants and products

complete ionic equation

equation showing dissolved ionic compounds in an aqueous solution as their free ions

net ionic equation

equation without spectator ions, indicating only those particles directly involved in a reaction with balanced charges on both sides of the equation

spectator ions

ions not directly involved in a reaction and seen on both sides of the equation

electrolysis

process in which electric current decomposes a substance

Which of the following is a reactant in the combustion reaction which produces 3CO2 and 4H2O?

propane

combustion reaction

reaction in which oxygen combines with an element or compound to release energy in the form of heat and light

double-replacement reaction

reaction in which the positive ions of two compounds replace each other to form two new compounds

reversible reaction

reaction in which the products react with each other and form the original reactants

combination (synthesis) reaction

reaction in which two or more reactants form a single product

catalyst

substance used to increase the rate of a chemical reaction without being consumed itself

coefficient

whole number in front of a chemical formula used to balance a chemical equation