9. Cobalt ions form complex ions with water and chloride as shown in the reaction. The left side of the reaction is pink, and the right side of the reaction is blue.
Co(H2O)62+ + 4Cl– + heat ⇄ CoCl42–+ 6H2O
Which statement about the system at equilibrium is correct?
Cooling a purple solution will turn it pink.
Adding water to a purple solution will turn it blue.
Adding hydrogen chloride (HCl) to a blue solution will turn it purple.****
Heating a blue solution will turn it purple.
10. Why are rubber and metal both useful while making wire?(1 point)
Both are good insulators, but one is flexible while the other is rigid.
Both are flexible, but one reflects electromagnetic waves well while the other transmits them.
Both are good insulators, but one is more ductile than the other.
Both are flexible, but one conducts electricity while the other insulates.****
I agree with 2 but not 1. The correct answer for #1 is a. This is all about Le Chatelier's principle. Le Chatelier's Principle says "when we do something to a system at equilibrium, it will try to undo what we did to it." Note that the reactants are pink, the products are blue, half way in between is purple.
Co(H2O)62+ + 4Cl– + heat ⇄ CoCl42–+ 6H2O
..................pink.................purple........blue
Cooling a purple solution will turn it pink.
If we cool it the system will try to heat it up so the reaction will shift to the left in order to add heat that we're taking away so it will turn pink. This is the correct answer.
Adding water to a purple solution will turn it blue.
If we add water the reaction will shift to the left in order to use up the water we've added so it will go to pink and not blue.
Adding hydrogen chloride (HCl) to a blue solution will turn it purple.****
Adding Cl^- will make the shift to the right. It is already blue.
Heating a blue solution will turn it purple.
Heating the solution will turn it blue. It's already blue so you won't go through the purple phase.
Wow I actually understood this better than my text books. Thank you.
The correct statement about the system at equilibrium is:
Adding hydrogen chloride (HCl) to a blue solution will turn it purple.
As for the question regarding rubber and metal in wire production, the correct answer is:
Both are flexible, but one conducts electricity while the other insulates.
To answer question 9, we need to understand the reaction and the colors involved. The reaction shows cobalt ions forming complex ions with water and chloride. On the left side of the reaction, we have Co(H2O)62+ (pink), and on the right side, we have CoCl42– (blue).
At equilibrium, the system is balanced, and the concentrations of the reactants and products are stabilized. Looking at the reaction, we can see that the Co(H2O)62+ complex ion on the left side is pink, while the CoCl42– complex ion on the right side is blue.
Based on this information, the correct statement about the system at equilibrium is "Adding hydrogen chloride (HCl) to a blue solution will turn it purple." To understand why this happens, we can analyze the reaction. Adding hydrogen chloride to the blue solution increases the concentration of chloride ions (Cl–). These chloride ions react with CoCl42–, forming Co(H2O)62+ (pink). This results in a purple color due to the presence of both pink and blue species in the solution at equilibrium.
For question 10, we need to understand the properties of rubber and metal wires. Rubber is a good insulator, meaning it does not conduct electricity well. Metal, on the other hand, is a good conductor of electricity.
The statement "Both are flexible, but one conducts electricity while the other insulates" is correct. Rubber and metal wires are both flexible, making them suitable for various applications. However, rubber insulates electricity, while metal conducts electricity. This difference in electrical conductivity makes both rubber and metal wires useful in different scenarios.