Lakeland Chemical Reactions Review
description
Transcript of Lakeland Chemical Reactions Review
![Page 1: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/1.jpg)
Lakeland Chemical Reactions Review
![Page 2: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/2.jpg)
Click on a question to begin1 6 11
2 7 12
3 8 13
4 9 14
5 10 15
![Page 3: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/3.jpg)
Given the unbalanced equation: __Fe2O3 + __CO →__Fe + __CO2When the equation is correctly balanced using the smallest whole-number coefficients, what is the coefficient of CO?A) 1 B) 2
C) 3 D) 4
Question 1
![Page 4: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/4.jpg)
Try Again
Try Again
• Try to balance the O atoms to get the correct coefficient
![Page 5: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/5.jpg)
Correct!
• The balanced equation is:Fe2O3 + 3CO 2Fe + 3CO2
Next Question
![Page 6: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/6.jpg)
Which of these metals will react most readily with 1.0 M HCl toproduce H2(g)?
A) Ca B) Mg
C) K D) Zn
Question 2
![Page 7: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/7.jpg)
Try Again
Try Again
• Use the Activity Series for Metals on your periodic table to decide which metal is the most active
![Page 8: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/8.jpg)
Correct!
• Potassium is the most active metal on the activity series, so it will most readily replace hydrogen in HCl
Next Question
![Page 9: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/9.jpg)
When a neutral atom undergoes oxidation, theatom’s oxidation state
A) Decrease as it gains electrons B) Decrease as it loses electrons
C) Increase as it gains electrons D) Increase as it loses electrons
Question 3
![Page 10: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/10.jpg)
Try Again
Try Again
• LEO says GER. Oxidation state is another name for charge
![Page 11: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/11.jpg)
Correct!
• As a substance loses electrons its oxidation state becomes more positive
Next Question
![Page 12: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/12.jpg)
In which compound does chlorine have thehighest oxidation number?
A) NaClO4 B) NaClO3
C) NaClO2 D) NaClO
Question 4
![Page 13: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/13.jpg)
Try Again
Try Again
• You are looking for the charge of chlorine. Use the charge of Na and O to solve for the charge of chlorine.
![Page 14: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/14.jpg)
Correct!
• In NaClO4 chlorine must have a charge of 7+
Next Question
![Page 15: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/15.jpg)
Which equation represents a double replacementreaction?
A) 2 Na + 2 H2O → 2 NaOH + H2 B) CaCO3 → CaO + CO2
C) LiOH + HCl → LiCl + H2O D) CH4 + 2 O2 → CO2 + 2 H2O
Question 5
![Page 16: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/16.jpg)
Try Again
Try Again
• A double replacement is two compounds reacting to form two new compounds
![Page 17: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/17.jpg)
Correct!
• LiOH + HCl LiCl + H2O is two compounds reacting to form two new compounds
Next Question
![Page 18: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/18.jpg)
In most aqueous reactions as temperature decreases, the effectiveness of collisions between reacting particles
A) increases B) decreases
C) Remains the same D) Impossible to tell
Question 6
![Page 19: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/19.jpg)
Try Again
Try Again
• As the temperature decreases molecules slow down
![Page 20: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/20.jpg)
Correct!
• As temperature decreases molecules slow down and therefore do not collide as often
Next Question
![Page 21: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/21.jpg)
Given the reaction: Cu(s) + 4HNO3(aq) → Cu(NO3)2(aq) + 2NO2(g) + 2H2O(_)As the reaction occurs, what happens to copper?
A) It undergoes reduction and its oxidation number decreases.
B) It undergoes reduction and its oxidation number increases.
C) It undergoes oxidation and its oxidation number decreases.
D) It undergoes oxidation and its oxidation number increases.
Question 7
![Page 22: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/22.jpg)
Try Again
Try Again
• Compare the charge of copper when it is by itself as a reactant and a cation in Cu(NO3)2 as a product
![Page 23: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/23.jpg)
Correct!
• Copper has a charge of 0 as a reactant and a charge of +2 as a product. An increase in charge occurs as electrons are lost which is oxidation.
Next Question
![Page 24: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/24.jpg)
The activation energy required for a chemicalreaction can be decreased by
A) increasing the surface area of the reactant
B) adding a catalyst to the reaction
C) increasing the temperature of the reactant
D) adding more reactant
Question 8
![Page 25: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/25.jpg)
Try Again
Try Again
• Temperature, surface area and concentration all change the speed of reaction by changing the amount of collisions
![Page 26: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/26.jpg)
Correct!
• A catalyst reduces the amount of activation energy needed to start a reaction
Next Question
![Page 27: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/27.jpg)
Which expression correctly represents a balancedreduction half-reaction?
A) Na+ + e– → Na B) Na → Na+ + e–
C) Cl2 + 2e– → Cl– D) 2Cl– → Cl2 + 2e–
Question 9
![Page 28: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/28.jpg)
Try Again
Try Again
• Reduction is a gain of electrons. Make sure that both charge and number of atoms are balanced.
![Page 29: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/29.jpg)
Correct!
• Na+ + e- Na shows both a gain of electrons and is balanced with charge and number of atoms
Next Question
![Page 30: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/30.jpg)
In which substance does phosphorus have a+3 oxidation state?
A) P4O10 B) PCl5
C) Ca3(PO4)2 D) KH2PO3
Question 10
![Page 31: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/31.jpg)
Try Again
Try Again
• Use the charges of the other atoms to determine the charge of P in each compound
![Page 32: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/32.jpg)
Correct!
• In KH2PO3 K and H have a charge of +1 and O has a charge of -2. To end up with a balanced compound, P must have a charge of +3
Next Question
![Page 33: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/33.jpg)
Given the unbalanced equation: ____N2(g) + ____O2(g) -->__N2O5(g) When the equation is balanced using smallest whole numbers, the coefficient of N2(g) will be
A) 1 B) 2
C) 4 D) 5
Question 11
![Page 34: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/34.jpg)
Try Again
Try Again
• Make sure that you have equal number of both N and O
![Page 35: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/35.jpg)
Correct!
• The balanced equation is 2N2 + 5O2 2N2O5
Next Question
![Page 36: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/36.jpg)
In the presence of excess oxygen, hydrocarbonsburn completely to form water and
A) C B) CO
C) CO2 D) CO3
Question 12
![Page 37: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/37.jpg)
Try Again
Try Again
• A hydrocarbon and oxygen reacting is a combustion reaction.
![Page 38: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/38.jpg)
Correct!
• A hydrocarbon and oxygen will always react to form water and carbon dioxide (CO2)
Next Question
![Page 39: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/39.jpg)
What is the correct balanced equation for lithium and nitrogen produce lithium nitride
A) Li + N LiN B) 6 Li + N2 2 Li3N
C) 3 Li + N Li3N D) Li + N2 LiN2
Question 13
![Page 40: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/40.jpg)
Try Again
Try Again
• Nitrogen is a diatomic element. Remember to use the charges for the ions in order to put lithium and nitrogen together.
![Page 41: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/41.jpg)
Correct!
• Lithium (Li) and nitrogen (N2) produce lithium nitride (Li3N) according to the equation 6 Li + N2 2 Li3N
Next Question
![Page 42: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/42.jpg)
The reactants side of the chemical equation of zinc and hydrochloric acid is shown below:
Zn + 2HCl ?
Which of the following represents the products of this reaction?
A) ZnH2 + Cl2 B) 2 ZnCl + 2H
C) ZnCl2 + H2 D) ZnCl + H2
Question 14
![Page 43: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/43.jpg)
Try Again
Try Again
• Zinc is a metal so it should replace the cation in HCl since this is a single replacement reaction.
![Page 44: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/44.jpg)
Correct!
• Zinc replaces Hydrogen according to the equation: Zn + 2HCl ZnCl2 + H2
Next Question
![Page 45: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/45.jpg)
The reactants side of the chemical equation of copper (II) chloride and sodium hydroxide is shown below:
CuCl2 + 2 NaOH ?
Which of the following represents the products of this reaction?
A) Cu(OH)2 + 2 NaCl B) CuNa2 + 2ClOH
C) NaCl + CuOH D) NaCu + OHCl
Question 15
![Page 46: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/46.jpg)
Try Again
Try Again
• Double replacements follow the pattern:AB + CD AD + CB
![Page 47: Lakeland Chemical Reactions Review](https://reader036.fdocuments.us/reader036/viewer/2022081505/56816295550346895dd30a26/html5/thumbnails/47.jpg)
Correct!
• The balanced equation is: CuCl2 + 2NaOH 2 NaCl + Cu(OH)2
Next Question