Science Chapter 7
Terms in this set (64)
Double Displacement Reaction
A precipitate, water, or a gas forms when two ionic compounds are dissolved in a solution.
Two or more substances combine to form another substance.
Single displacement reaction
One element replaces another in a compound.
A substance breaks down into two or more simpler substances.
T/F In a SINGLE displacement reaction, water, a gas, or a precipitate is formed when two ionic compounds are dissolved in a solution.
T/F In a DECOMPOSITION reaction, two or more substances combine to form another substance.
T/F AN insoluble compound formed in a double displacement reaction is called a PRECIPITATE.
T/F In a SINGLE displacement reaction, one element replaces another element in a compound.
T/F If water is broken down to form hydrogen gas and oxygen gas, a SINGLE DISPLACEMENT reaction has taken place.
T/F In a DOUBLE DISPLACEMENT reaction, a substance is broken down to form two or more simpler substances.
T/F If carbon and oxygen unite to form carbon dioxide, a SYNTHESIS reaction has occurred.
T/F A double displacement reaction involves COVALENT compounds.
A ______________ is a well-defined example of a chemical change.
A chemical ___________ can be used to show the changes that occur in a chemical reaction.
In a chemical equation, the substances on the left side of the arrow are the starting substances. These substances are called ______.
The substances on the right side of the arrow are the substances that result from the reaction. These substances are called _____________.
The arrow is read as either produces or _______.
According to the law of conservation of ____, atoms are neither lost nor gained during a chemical reaction.
The law of conservation of mass is illustrated when a chmical equation is _________.
When the balancing of the equation is done there will be the same number of _____ of each kind on both sides of the equation.
In a chemical equation, the numbers that are placed in front of the symbols and the formulas are called __________.
Coefficients are necessary to keep the _________ of atoms in balance.
There are several rules for balancing an equation. First, write the correct _______ for each reactant and product.
There are several rules for balancing an equation. Second choose the coefficients that make the number of atoms of each _________ on each side of the equation equal.
If you change the formula of a substance, the equation is no longer _________.
Changing a formula will indicate a __________ different than the one intended.
The arrow in a chemical equation means "produces" or "_______."
means "dissolved in water"
combination of chemical symbols used to represent a compound.
well-defined example of a chemical change.
substances produced in a chemical reaction.
numbers before symbols that represent the relative number of substances taking part in a reaction.
letters used to represent elements.
substances that react to produce a chemical change.
well defined example of a chemical change.
compound represented by O3
In a chemical equation, (g) means this.
Substances on the left side of a chemical equation.
In a chemical equation, (cr) means this.
substances produced by a chemical reaction.
Type of compounds involved in a double displacement reaction.
In a chemical equation, numbers in front of chemical formulas.
One of the elements making up chlorofluorocarbons.
Chemical reactions that require energy.
Chemical reactions that produce energy.
Substance that speeds up a chemical reaction without undergoing a permanent change.
Substance that slows down a chemical reaction.
Type of chemical reaction in which a compound is broken down into simpler substances.
Chemical reaction that combines two or more substances to produce another substance.
The arrow in a chemical equation reads as this.
In a chemical equation, (aq) means this.
In a chemical equation, (l) means this.
Chemical equations must be balanced to meet the law of conservation of ________.
abbreviation for chlorofluorocarbon.
Placing oil on a metal part helps to keep the part from rusting. Is the oil a catalyst, and inhibitor, or neither.
In the human body, proteins called enzymes help to speed up chemical processes. The proteins are not changed during these chemical processes. Are the enzymes catalysts, inhibitors, or neither.
Painting a metal surface keeps water from touching the metal and causing the metal to rust. Is the pain a catalyst, an inhibitor, or neither.
Food preservatives called BHT and BHA slow down the spoilage of certain foods. Are BHT and BHA catalysts, inhibitors, or .
Nickel is used to increase the rate of methane formation from the addition of hydrogen and carbon monoxide. nickel does not permanently change. Is nickel a catalyst, inhibitor, or neither.
When a lit match is placed in alcohol, the alcohol ignites producing heat and light. Endothermic/Exothermic?
Energy in the form of electricity can be added to water to break apart the water molecules into hydrogen gas and oxygen gas. Endothermic/Exothermic?
A piece of coal placed in a furnace gives off heat and light before turning into ash. Endothermic/Exothermic?
When ammonium chloride mixes with water, the solution formed feels cold.