Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Chapter 2, Problem 9RQ
When acids are added to a solution, the pH should ___________ .
a. decrease
b. increase
c. stay the same
d. cannot tell without testing
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Chapter 2 Solutions
Biology 2e
Ch. 2 - Figure 2.3 How many neutrons do carbon-12 and...Ch. 2 - Figure 2.7 An atom may give, take, or share...Ch. 2 - Figure 2.24 Which of the following statements is...Ch. 2 - If xenon has an atomic number of 54 and a mass...Ch. 2 - Atoms that vary in the number of neutrons found in...Ch. 2 - Potassium has an atomic number of 19. What is its...Ch. 2 - Which type of bond represents a weak chemical...Ch. 2 - Which of the following statements is not true?...Ch. 2 - When acids are added to a solution, the pH should...Ch. 2 - We call a molecule that binds up excess hydrogen...
Ch. 2 - Which of the following statements is true? Acids...Ch. 2 - Each carbon molecule can bond with as many as...Ch. 2 - Which of the following is not a functional group...Ch. 2 - What makes ionic bonds different from covalent...Ch. 2 - Why are hydrogen bonds and van der Waals...Ch. 2 - Discuss how buffers help prevent drastic swings in...Ch. 2 - Why can some insects walk on water?Ch. 2 - What property of carbon makes it essential for...Ch. 2 - Compare and contrast saturated and unsaturated...
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- which of the following is a characteristic of a buffer? a. The pH will go down significantly when H3O+ is added to the buffer b. The pH will go down very slightly when H3O+ is added to the buffer c. The pH will go up significantly when H3O+ is added to the bufferarrow_forward_____________contribute hydrogen ions (H+) to a solution.a. Basesb. Isotopesc. Acidsd. Compoundsarrow_forwardAmelia tests several substances in her house to determine their pH values and records the results. Substance pH Lemon juice 2.3 Tap water 6.7 Bleach 12.3 Soapy water 11.7 Can of tomatoes 4.5 Dishwasher detergent 10.9 What do the basic substances have in common? A They are all used in cooking. B They are all used in cleaning products. C They are all clear or transparent. D They are all sour tasting when eaten.arrow_forward
- As pH decreases, a solution becomes more acidic.arrow_forwardThe test for starch in water is A. silver nitrate. B. iodine. C. barium ions. D. sulfuric acid. E. chloride ions.arrow_forwardSubstances those are partially dissolved in water are commonly known as اخترأحد الخيارات a. hydrophilic / hydrophobic b. false statement c. hydrophilic d. hydrophobic e. all given choices are incorrectarrow_forward
- Which two statement about the substances in this experiment are true? A. Chalk is harder than quartz. B. Isopropyl alcohol boils more easily than vegetable oil. C. Water has a higher surface tension than soapy water. D. Saltwater has a higher surface tension than plain water.arrow_forwardBuffers are mixtures of a weak acid and a weak base that combine with a strong acid or base to limit changes in pH. True O Falsearrow_forwardIf the addition of an acid or a base to a solution does not change its pH (or changed minimally), then that solution is referred to as a a. acid b. base c. buffer d. neutral solutionarrow_forward
- Give the conclusionarrow_forwardWhat is the concentration in % (w/w), of a solution prepared by mixing 50.0 g NaCl and 150.0 g water? A. 0.250 % B. 33.3 % C. 40.0 % D. 25.0 % E. 3.00 %arrow_forwardWhen some of the sugar added to iced tea remains undissolved on the bottom of the glass, the solution can be described as A. dilute В. polar C. nonpolar D. saturated E. unsaturatedarrow_forward
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