Exam 3 Chemical Reactions Flashcards
A rehashing of tests, quizzes, definitions and examples from chapter 4ish plus aquaous solutions are emphasizedddd
What Three different kinds of equations are used to represent chemical reactions in aqueous solution: __________________
Molecular equation
Ionic
and Net Ionic
A ___________________ is a chemical equation showing the complete, neutral formulas for every species in a reaction.
molecular equation
Classify the following reaction
A) decomposition
B) gas forming
C) combination
D) percipitation
B) gas forming
A reaction in which two aqueous salt solutions combine to form an insoluble salt is called, ___________________
precipitation reaction
Is this a single replacement reaction? why?
yes,
________________ Ions that are the same on both sides of an ionic equation
spectator ions
___________ An equation that shows the formulas of all the species involved in a chemical reaction
molecular equation
An equation that shows all the ions as well as other species involved in a chemical reaction
ionic equation
An equation that shows only the species that are involved in the change that occurs during a chemical reaction
net ionic equation
In a single- replacement reaction, sodium metal reacts with water to form aqueous sodium hydroxide as one of the products. Which equation below correctly represents this reaction?
C)
which of the following two solutions will result in the formation of a precipitate when they are mixed?
A)
The following repersents a ______ ______ equation.
net ionic equation
K is an example of a _______ ion.
spectator ion
What will be the net ionic equation for this reaction?
B)
What is the identity of the gas that is produced when a lithium sulfite solution and hydrochloric acid are mixed?
A) sulfur dioxiode
B) sulfur trioxide
C) chlorine
A) sulfur dioxide
What is evidence of a chemical reaction?
A) a color change during a reaction
B) formation of precipitate
C) the sublimation of a solid to a gas
D) Both A and B
D) Both A and D
The ______ quantity must always be the same on both sides of a balanced chemical equation?
The number of each type of atom
What are the coefficients, written from left to right that will correctly balance the following equation?
2, 9, 6, 8
2
This reaction is a good example of a ________ reaction:
A) combustion
B) decomposition
B) decomposition reaction
When C3H8 burns completely in oxygen, what are the likely products?
_____________ and _____________
CO2 and H2O
True/False
An example of a correctly balanced reaction of solid copper reacting with solid sulfur to form solid copper(I) sulfide.
True
True/False
An example of a correctly balanced reaction of solid copper reacting with solid sulfur to form solid copper(I) sulfide.
True
True/False
An example of a correctly balanced reaction of solid copper reacting with solid sulfur to form solid copper(I) sulfide.
False
True/False
An example of a correctly balanced reaction of solid copper reacting with solid sulfur to form solid copper(I) sulfide.
False
If solid lithium hydrogen carbonate decomposes upon heating to form solid lithium oxide, gaseous carbon dioxide, and liquid water, which reaction below is the complete and balanced molecular equation for the process?
Option 4 with the LIzO(solid) at the end and the 2 Li at the beginning
C)
C)
Only C is an example of a _____________ and _______________ reaction
combination and combustion reaction
So, when writing _____________, only strong acids and soluble ionic compounds (that is, strong electrolytes) are separated into ions because that is how they exist in the solution. All other species will remain as they appear in the molecular equation. The following is the __________ for the molecular equation for the reaction between silver nitrate and magnesium chloride shown above.
ionic equation
True/False Spectator ions are removed from the ionic equation in order to get the net ionic equation AND if the coefficients can be reduced to simple whole numbers that they should be reduced.
both are True
Explain what’s happening in the photo
the combustion of butane produces heat by the following reaction
2 C4H10 +13O2 —–8 CO2+10 H2O.
If you use a lighter, you push the button and turn the flint trigger that sparks at the same time which produces a flame. The flame is produced bc of the spark and since butane molecules are FLAMMABLE molecules. The butane molecules are also reacting with the oxygen in the air to form new molecules. The new molecules released from the combustion of butane molecules is carbon dioxide and water. (CO2 H2O)
The following equation shows the chemical reaction of methane gas, reacting with oxygen, to form carbon dioxide and water, such as on a kitchen stove.
WRITE A BALANCED EQUATION
In order for this equation to be balanced, the coefficient x must be
a) 3
b) 6
c) 9
d) 12
6
because the Ox on the reactant side has 18 atoms. on the product side its 8. the O2’s coefficient would be 6. bc 6*2=12 plus 6 from the CHO molecule. thus getting 18 atoms
Write a balanced equation for the reaction of solid aluminum with aqueous sulfuric acid to form aqueous aluminum sulfate and hydrogen gas.
steps 1) write the correct chemical compounds
2) balance the free elements last. Sulfur and oxygen occur in only one compound on each side of the equation so balance them first.
3) balance polyatomic ions as one unit. therefore put 3 infront of SO and 3 infront of HSO
4) balance Al next. 2 Al atoms on the right side of the equation, place a 2 infront of Al on the left.
5) balance H next. 6 H on the left side. put 3 on the left
Write a balanced equation for the reaction of aqueous lead (II) acetate with aqueous potassium iodide to form solid lead (II) iodide and aqueous potassium acetate
here’s each step in the equation
