3. What do you need to do to get the hot-tub water back to an acceptable pH? Wha

Question

3. What do you need to do to get the hot-tub water back to an acceptable pH? What specific substance might you use? What type of chemical reaction could occur when you add this substance? What would the products of this reaction be?

4. You notice that there are deposits of calcium carbonate (a hard, white substance) along the inside walls of the hot tub. What type of reaction caused this? In this type of reaction, what would you call the calcium carbonate deposits?

5. Your workday is over, and you are headed to a friend's house for a barbecue. You are in charge of cooking the hot dogs. You will be using a propane gas grill. When you ignite the grill, propane (C3H8) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water vapor (H2O). (11 points)

a. Write a balanced equation for this reaction. Be sure to show your work.

b. What type of reaction is this? What are the common reactants and products for this type of reaction?

c. This reaction can be classified as another type of reaction. What is it?

Explanation / Answer

Proper pH should be 7.2 to 7.6.

Sodium bicarbonate is used to raise pH and total alkalinity. Acids are used to reduce pH.

Alkalinity of 80-120ppm is preferred.

When sodium bicarbonate is added to water, exothermic reaction occurs.

NaHCO3 + H2O ---> NaOH + H2CO3

H2CO3 ---> H2O + CO2

Product of reaction are NaOH, H2O, CO2 .

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.