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Chemistry Acid Base Questions

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Questions and Answers

What is the primary reason 11C is unstable and radioactive?

Its n/p ratio is too high

It has an odd number of neutrons

Its n/p ratio is too low (correct)

It has an odd number of protons

What is a characteristic of a second-order reaction?

The rate constant increases with increasing temperature

The rate is proportional to the square of the rate constant

The rate is proportional to the initial concentration

The half-life is independent of the initial concentration (correct)

What is the pH of neutral water at 25°C?

8.0

7.0 (correct)

9.2

6.4

What type of emission would lead to stability in 11C?

Positron emission Signup and view all the answers

What is the effect of increasing temperature on the rate of a second-order reaction?

The rate increases Signup and view all the answers

What is the result of an n/p ratio that is too high?

Alpha emission Signup and view all the answers

What is the nature of the autodissociation of water and how does the dissociation constant Kw change with increasing temperature?

endothermic, increasing Signup and view all the answers

What is the role of Al3+ ions in a 0.1 M solution of AlCl3 with a pH of 5.5?

Lewis Acid; Bronsted Acid Signup and view all the answers

What is emitted during the chain reaction in a nuclear power plant?

neutrons Signup and view all the answers

What is the relationship between bond making and energy?

releases Signup and view all the answers

What is true about a reaction at equilibrium with a very large Keq?

the forward rate constant equals the reverse rate constant Signup and view all the answers

Which of the following is a redox reaction?

Nuclear fission of uranium-235 Signup and view all the answers

What is the type of bonding in AgCl?

Ionic Signup and view all the answers

What is the effect of adding a small amount of HCl to an aqueous solution containing hydrogen fluoride and fluoride ions?

The concentration of hydrogen fluoride will decrease, and the concentration of fluoride ions will increase. Signup and view all the answers

What is the effect of a catalyst on a chemical reaction?

It decreases the activation energy of the forward reaction only. Signup and view all the answers

What is the significance of ∆Hfo?

It is the standard enthalpy change for a reaction. Signup and view all the answers

Why is isotopic enrichment of uranium necessary for use in nuclear power reactors and nuclear weapons?

To achieve a critical mass for a sustained nuclear reaction. Signup and view all the answers

What type of reaction is represented by the equation Pb2+ (aq) + 2Cl- (aq) → PbCl2 (s)?

Precipitation reaction Signup and view all the answers