Chemistry, 15.01.2021 04:10 FlayMaster101
Conclusion: (20 pts)
1. Place the five substances in order of increasing pH-from most acidic to most basic. (2 points)
2. Orange juice has a pH of 4. What color would you expect the paper test strip to be after it is dipped in a sample of orange juice?
(2 points)
3. Determining the pH of substances such as purple grape juice and catsup using test strips can be difficult. Why? (3 points)
4. Tear-free shampoos are advertised as having a pH similar to that of human tears. What pH would you expect tear-free
shampoos to be? Use evidence from the lab activity to support your response. (5 points)
5. What is the approximate hydronium ion concentration and hydroxide ion concentration in a cup of tea? Which is higher? (Refer
back to the chart of pH if you need to.) (4 points)
6. What is the approximate hydronium ion concentration and hydroxide ion concentration in bleach? Which is higher? (4 points)
Answers: 1
Chemistry, 22.06.2019 18:10
Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
Chemistry, 23.06.2019 04:40
Temperature is defined as a. the equivalent of heat. b. a measure of the average kinetic energy of the individual atoms or molecules composing a substance. c. how hot or cold it is. d. the total kinetic energy of the atoms or molecules composing a substance. e. none of the above is correct.
Answers: 1
Conclusion: (20 pts)
1. Place the five substances in order of increasing pH-from most acidic to m...
Computers and Technology, 01.07.2019 18:10
Mathematics, 01.07.2019 18:20