Please Help me with this multiple choice questions, i would appreciate it Use th

Question

Please Help me with this multiple choice questions, i would appreciate it

Use the following system of reactions to answer questions 4 and 5: Mining releases limestone into waterways and lakes. Limestone has the formula CQCO3. Assume that this compound dissolves in water. How would extra limestone affect the pH of a lake? raise the pH lower the pH no effect on pH it's impossible to tell none of the above answers are correct Driving an electric car is supposed to be better for the environment. The problem is that you need the electricity from somewhere. The most common way to generate electricity in North America is by burning coal (to boil water to turn electrical generators with steam). Burning coal produces C02. How will driving this car ultimately affect the pH of a lake? raise the pH lower the pH no effect on pH it's impossible to tell none of the above answers are correct For questions 6-10: The equilibrium constant Keq for the basic association of HSO-4 (aq) with H-(aq) to become HzSO4 (aq) is about 1.0 times 10-3. At equilibrium w

Explanation / Answer

4-a ( By the dissolution of CaCO3 in water CO3 2- concentration increases in lake and according to LeChatlier principle equilibrium shifts backward i.e. decrease in conc.of H+ ions. That means increasing of pH value.)

5-b ( Burning coal produces CO2. When CO2 dissolved in water H2CO3 is formed which on dissociation produces H+ ions. That means decrease in pH value.)

6-d

7-b

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---