Question

The balanced equation below represents the reaction between a 5.0 gram sample of zinc metal and 0.5 M of hydrochloric acid. The reaction takes place in an open test tube at 298K and 1 atm in a laboratory activity ​

Answer 1

Answer:

1) Increasing the concentration of HCl [HCl] will increase the reaction rate.

2) The potential energy diagram is shown in the attached image.

3) Because of it is an irreversible reaction that goes to the forward direction . The reaction takes place till HCl dissolves Zn completely.

Explanation:

Q1: State one change in reaction conditions, other than adding catalyst, that will increase the rate of the reaction.

• The rate of the reaction, dissolving Zn in HCl, depends on the concentration of HCl.

Rate = k[HCl]².

Rate ∝ [HCl]².

• The rate is directly proportional to the concentration of HCl raised to the power 2,

So, increasing the concentration of HCl [HCl] will increase the reaction rate.

Q2: Draw a potential energy diagram for this reaction.

• Since the reaction releases energy that appears in the products side. So, the reaction is an exothermic reaction.

In an exothermic reaction, the energy of the reactants is higher than that of the products.

The potential energy diagram is shown in the attached image.

Q3: Explain why this reaction will not reach equilibrium.

Because of it is an irreversible reaction that goes to the forward direction . The reaction takes place till HCl dissolves Zn completely.

Answer 2

To increase the rate of forward reaction, we have to use the zinc in the finely divided form to ensure a greater surface area is  available for reaction.

What is an open system?

An open system is one in which there is an exchange of materials and energy. A typical approximation of an open system is the open vessel. As such, this reaction is taking place in an open system.

The reaction can not attain equilibrium due to the loss of the H2 gas due to the open system. Another way to increase the rate of forward reaction is to use the zinc in the finely divided form to ensure a greater surface area is  available for reaction.

Learn more about open system: https://brainly.com/question/1190311