Unit 4 Review

Balancing equations

100

Balance the following chemical equation: 

__KBr + __H₃PO₄ --> __K₃PO₄ + __HBr

3 KBr + H₃PO₄ --> K₃PO₄ + 3 HBr

200

Balance the following chemical equation:

__NaOH + __H₂CO₃ → __Na₂CO₃  + __H₂O

2 NaOH + H₂CO₃ → Na₂CO₃  + 2 H₂O

300

Balance the following chemical equation:

__ Al + __ HCl → __ H₂ + __ AlCl₃

2 Al + 6 HCl → 3 H₂ + 2 AlCl₃

400

Balance the following chemical equation:

__Fe₂O₃ + __HNO₃ --> __Fe(NO₃)₃ + __H₂O

Fe₂O₂ + 6 HNO₃ --> 2 Fe(NO₃)₃ + 3 H₂O

500

Balance the following chemical equation:

__C₄H₁₀ + __O₂ → __CO₂ + __H₂O

2C₄H₁₀ + 13O₂ → 8CO₂ + 10H₂O

Types of chemical reactions

100

How many types of chemical reactions are there?
Cuantos tipos de reacciones quimicas hay?

6

200

What are the all the types of chemical reactions?

Que son todos los tipos de reacciones quimicas?

Synthesis, Decomposition, Dissociation, Combustion, Single-replacement, & Double-replacement

300

What is the parent function of a single replacement reaction?
Cual es la función parental de una reaccion reemplazo solo?

A + BC --> B + AC
or
A + BC --> C + BA

400

What type of chemical reaction is occuring?

C₂H_4(aq) + 3O_2(g) ➙ 2CO_2(g) + 2H₂O_(g)

Combustion

500

What type of chemical reaction?
Que tipo de reaccion quimica?

K₃PO₄ --> 3K + PO₄

Dissociation

Chemical Formulas

100

What is the name of the chemical:

NaClO₃

Sodium Chlorate

200

Chemical formula of:
Potassium sulfite

K₂SO₃

300

What is the name of the chemical:

Ca(C₂H₃O₂)₂

Calcium Acetate

400

Chemical formula of: Ammonium Nitrate

NH₄NO₃

500

Chemical formula of:

Magnesium Carbonate

MgCO₃

Vocab

100

The number that represents the number of ATOMS in a MOLECULE
La cantidad que representa el numero de ATOMOS en una MOLECULA

Subscript

200

The number that represents the quantity of certain molecules needed in a balanced chemical reaction
El número que representa la cantidad de unas moléculas necesarias en una reacción química equilibrada.

A coefficient

300

Roughly defined as: When one or more chemicals rearrange to form one or more new and different chemicals
Definido de manera aproximada como: cuando una o más sustancias químicas se reorganizan para formar una o más sustancias químicas nuevas y diferentes.

A Chemical Reaction

400

Defined as: A charged chemical compound composed of two or more atoms covalently bonded together that behave as a single unit
Se define como: Un compuesto químico cargado hecho de dos o más átomos unidos covalentemente que se comportan como una sola unidad.

A polyatomic ion

500

How does the criss-cross method work? What is the relationship between the variables involved?
¿Cómo funciona el método criss-cross? ¿Cuál es la relación entre las variables involucradas?

The charge of one gives the amount of the other

La carga de una nos da la cantidad de la orta

Misc.

100

These two words represent chemicals before and after a chemical reaction
Estas dos palabras se representan las quimicas antes and despues de un reaccion quimica

Reactant / Products

200

What is (GENERALLY) the difference between decomposition & dissociation?
¿Cuál es (generalmente) la diferencia entre descomposición y disociación?

Decomp: Breaking covalent bonds 

Dissociate: Breaking ionic bonds

300

What is the first step of balancing a chemical equation?

cual es el primer paso en balancear equacciones quimicas?

Identify

400

What type of chemical reaction is (usually) reversible?

cual reaccion quimica es (generalmente) reversible?

Dissociation

500

Why must equations be balanced?

¿Por qué deben estar balanceadas las ecuaciones?

To maintain the law of conservation