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Vocabulary
Chemical Reactions
Balancing Chemical Equations
Word Equations
Acids & Bases
100
What are the substance(s) that are present at the start of a reaction?
reactants
100
This is an example of what kind of reaction? Pb(NO3)2 + K2CrO4 ---> PbCrO +2KNO3
double replacement
100
Balance this equation: H2 + O2 ---> H2O
2H2 + O2 ---> 2H2O
100
Put in to chemical symbols and balance: Aluminum bromide and chlorine gas react to form aluminum chloride and bromine gas.
2AlBr3 +3Cl2 --> 2AlCl3 + 3Br2?
100
What has a sour taste, reactivity with metals, and the ability to produce color changes in indicators?
acids
200
A mole contains how many particles of a substance?
6.02 X 10^23 particles DOUBLE POINTS! What is this number called?
200
This is an example of what kind of reaction? P4 + 5O2 ---> P4O10
synthesis
200
Balance this equation: N2 + H2 --> NH3
N2 + 3H2 --> 2NH3
200
Write in words: 2H2 + O2 --> 2H2O
Hydrogen gas and oxygen gas react to form water.
200
What is it called when a substance has a pH of 7?
neutral DOUBLE POINTS! Give an example.
300
What are the substances produced from a chemical equation?
products
300
This is an example of what kind of reaction? 2H3PO4 ---> H4P2O7 + H2O
decomposition
300
Balance this equation: Al + H2SO4 --> Al2(SO4)3 + H2
2Al + 3H2SO4 --> Al2(SO4)3 + 3H2
300
Write the chemical equation and balance: Phosphorus and oxygen gas react to form diphosphorus pentoxide.
4P + 5O2 --> 2P2O5
300
What has a bitter taste, slippery feel, and the ability to produce color changes in indicators?
bases
400
This states that mass (or energy) is neither created nor destroyed in a chemical reaction.
the law of conservation of mass
400
This is an example of what kind of reaction? Pb(NO3)2 + Mg --> Pb + Mg(NO3)2
single replacement
400
Balance this equation: Al + Fe2O3 --> Al2O3 + Fe
2Al + Fe2O3 --> Al2O3 + 2Fe
400
Write the chemical formula and balance: silver nitrate and sodium chloride react to form silver chloride and sodium nitrate.
AgNO3 + NaCl --> AgCl + NaNO3
400
An indicator changes red. Is it an acid or base?
base DOUBLE POINTS! What is the possible pH?
500
What is a coefficient?
a number that appears before a formula in a chemical equation, used for balancing, determines the number of moles for that compound
500
A reaction in which a substance reacts rapidly with oxygen, often producing heat and light, or CO2 and H20.
combustion reaction
500
Balance the equation: C4H10 + O2 --> H2O +CO2
2C4H10 + 13O2 --> 10H2O + 8CO2
500
Write the word equation from this equation: 2H2 + 2NO --> 2H2O + N2
Hydrogen gas and nitrogen monoxide react to form water and nitrogen gas.
500
An indicator changes blue. Is it an acid or base?
acid DOUBLE POINTS! What is the possible pH?