Sign up for FREE

7.5 Equilibrium Lab

Last updated over 3 years ago

10 questions

1

1

1

1

1

Question 5

5.

Lab Video- Note it's slightly different than our lab. We're starting at CaCl2  (calcium chloride) being added.  

1

Question 6

6.

Record your data and observations by clicking on Show your Work

1

1

1

Question 9

9.

1

Remember to record responses while we work on this. It will be used for your PS1-6 learning target grade, questions 1-6. 

Questions 7- 10 are optional to increase a low LT score

Question 1

1.

Question 2

2.

Question 3

3.

Question 4

4.

Which statement(s) are true if you increase the concentration (amount) of N2 for this reversible reaction at equilibrium. (Select all that apply)

There are more N2 molecules that can have effective collisions with H2 molecules to form more NH3 molecules.

There are fewer N2 molecules that can have effective collisions with H2 molecules to form less NH3 molecules.

The rate of the forward reaction will temporarily increase to try to achieve equilibrium (balance) again

The rate of reverse reaction will temporarily increase to try to achieve equilibrium (balance) again

Procedure notes: 

Step 1: 1/2 dropperful of cobalt chlorde (CoCl2)

Step 2: ~1/4 spoonful of calcium chloride CaCl2

Step 3: Add silver nitrate AgNO3 dropwise (~1/4 dropperful)

Step 4: 1 pipetful of water

Question 7

7.

Question 8

8.

Use the mole ratio from question 1 to calculate the amount of moles CoCl4-2 that would form if we added 1 mole  of Cl-1 to this reaction?

Question 10

10.

Use the molar mass of CoCl4-2 to calculate the mass of CoCl4-2 formed. (Hint: Add the atomic masses together to get your molar mass. Find your mass in grams by multiplying the moles from question 2 by the molar mass. Mols * Molar mass)

What are the reactants in the forward (exothermic) reaction?

N2 and H2

NH3

What are the reactants in the reverse (endothermic) reaction?

N2 and H2

NH3

When the reaction achieves equilibrium the rate of the forward reaction is the same as the rate of the reverse reaction. (both reactions are going at the same speed)

True

False

The concentration of the reactants equals (is the same as) the concentration of the products when a reaction is at equilibrium

True

False

Which reaction (forward or reverse) is endothermic?

Forward

Reverse

What is the ratio of moles of Cl-1 ions to CoCl4-2 based on the balanced chemical equation?

1:1

1:4

4:1

4:6 or 2:3

6:4 or 3:2