PDF chapter test TRY NOW
1. How does pH play an important role in everyday life?
- Blood has a pH of almost . Any change in this value causes diseases.
- Citrus fruits require slightly , whereas rice and sugarcane require and , respectively.
- Acid rain occurs when the pH of rainwater falls below , which is harmful in everyday life.
- pH changes cause tooth decay.
- The stomach produces too much during indigestion, causing pain and irritation.
2. What is a chemical equilibrium? What are its characteristics?
Chemical equilibrium is a state of a reaction in which the forward and backward rates of reaction are .
There is no change in the amount of reactants or products.
Characteristics of equilibrium:
- The rates of forward and backward reactions are in a chemical equilibrium.
The system's observable properties, such as pressure, concentration, colour, density, and viscosity, remain constant throughout time. - Even though it appears static from the outside, the chemical equilibrium is a dynamic equilibrium because both forward and backward reactions continue to take place.
- The volume of all phases is constant in .
Register for free to see more content