InstructionQuestions and Answers             Rationale
Instruction• There are 15 questions provided.• The questions are in a TRUE or FALSE and Multiple Choice  type of test.• Ch...
Bases as defined by Arrhenius are  Electron pair donors  Proton acceptors  Substance that produce hydrogen ions in aqueous...
An example of a strong acid is  dilute nitric acid  concentrated acetic acid  carbonic acid  citric acid  H2O
A given substance is an acid if inaqueous solution the substance  has a pH above 7  has a soapy feeling  turns litmus pape...
Pure water is neutral.
Which is NOT a base?  Mg(OH)2  BF3  H2O  NH3  KOH
Which of the following statementsis TRUE for all bases? Bases consist of oxides and hydroxides of metals.  When bases reac...
The color of phenolphthalein in anacid is colorless.
Indicators used in titration areadded to  the titrator  the acid only  the base only  both acid and base  the acid or base
A standard solution is one  which is basic in nature  which is acidic in nature  whose concentration is being tested  with...
NH4+ is a Lewis base.
Calculate the pH of 0.0001 M HClsolution.  7  12  1  4  2
Blood has an acidic pH.
An acid found in the stomach is  CH3COOH  HNO3  HCL  H2SO4  H2CO3
A pH of 2 is more acidic than a pOH of12.
When the hydrogen ion (H+) is indicatedin connection with its water solution,the ion represented is  OH-  H2O+  H2O2+  H3O...
Bases as defined by Arrhenius areD. Substance that produce hydroxide ions in aqueous solutionAn Arrhenius base is a substa...
An example of a strong acid isA. dilute nitric acidThere are only six strong acids:   HCl - hydrochloric acid    HNO3 - ni...
A given substance is an acid if inaqueous solution the substanceC. turns litmus paper redAn acid is a substance whose wate...
Pure water is neutral.TRUEIn pure water, (H3O+) or more often represented as [H+], is   1.0x10-7 M, and the [OH-] is also ...
Which is NOT a base?B. BF3BF3 is a Lewis acid. Mg(OH)2, NH3 and KOH are bases. H2O is   amphoteric, it can act as an acid ...
Which of the following statements isTRUE for all bases?D. Bases turn phenolphthalein from colorless to pink.Solutions of b...
The color of phenolphthalein in anacid is colorless.TRUEPhenolphthalein is often used in titrations, it turns colorless  i...
Indicators used in titration areadded toE. the acid or baseAn indicator is added to the titrand (either an acid or a   bas...
A standard solution is oneD. with known concentrationA standard solution is a solution containing a precisely  known conce...
NH4+ is a Lewis base.FALSENH4+ is a Lewis acid. It donates one proton (H+).                   H2O + NH4+ <--> H3O+ + NH3
Calculate the pH of 0.0001 M HClsolution.D. 4Given:   [H+] = 0.0001 M   [H+] = 10-4Solution:   pH = - log [10-4]   pH = - ...
Blood has an acidic pH.FALSEThe pH of blood is 7.35 – 7.45.  pH < 7.00    acidic solution  pH = 7.00    neutral solution  ...
An acid found in the stomach isC. HCLHydrochloric acid, normally found in the gastric juices, is  necessary for the proper...
A pH of 2 is more acidic than a pOHof 12.FALSEpOH is a measure of the concentration of hydroxide ions.  pOH = 14 – pH  pOH...
When the hydrogen ion (H+) is indicatedin connection with its watersolution, the ion represented isD. H3O+Hydronium ion (H...
quiz_acids and bases
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quiz_acids and bases

  1. 1. InstructionQuestions and Answers Rationale
  2. 2. Instruction• There are 15 questions provided.• The questions are in a TRUE or FALSE and Multiple Choice type of test.• Choose the BEST answer of each question. Just click the word/s or letter of your desired answer.• After each question, an explanation is given to aid understanding. Click the icon [ ].• To return, click . Click to proceed to the next page.• Answer HONESTLY.
  3. 3. Bases as defined by Arrhenius are Electron pair donors Proton acceptors Substance that produce hydrogen ions in aqueous solution Substance that produce hydroxide ions in aqueous solution All of the above
  4. 4. An example of a strong acid is dilute nitric acid concentrated acetic acid carbonic acid citric acid H2O
  5. 5. A given substance is an acid if inaqueous solution the substance has a pH above 7 has a soapy feeling turns litmus paper red reacts with a metal is colorless
  6. 6. Pure water is neutral.
  7. 7. Which is NOT a base? Mg(OH)2 BF3 H2O NH3 KOH
  8. 8. Which of the following statementsis TRUE for all bases? Bases consist of oxides and hydroxides of metals. When bases react with acids, the only product is salt. Bases are colorless. Bases turn phenolphthalein from colorless to pink. Bases taste sour.
  9. 9. The color of phenolphthalein in anacid is colorless.
  10. 10. Indicators used in titration areadded to the titrator the acid only the base only both acid and base the acid or base
  11. 11. A standard solution is one which is basic in nature which is acidic in nature whose concentration is being tested with known concentration which is added to the titrand
  12. 12. NH4+ is a Lewis base.
  13. 13. Calculate the pH of 0.0001 M HClsolution. 7 12 1 4 2
  14. 14. Blood has an acidic pH.
  15. 15. An acid found in the stomach is CH3COOH HNO3 HCL H2SO4 H2CO3
  16. 16. A pH of 2 is more acidic than a pOH of12.
  17. 17. When the hydrogen ion (H+) is indicatedin connection with its water solution,the ion represented is OH- H2O+ H2O2+ H3O+ None of the above
  18. 18. Bases as defined by Arrhenius areD. Substance that produce hydroxide ions in aqueous solutionAn Arrhenius base is a substance upon dissociation in water causes an increase in the concentration of the solvent anion, OH+.
  19. 19. An example of a strong acid isA. dilute nitric acidThere are only six strong acids: HCl - hydrochloric acid HNO3 - nitric acid H2SO4 - sulfuric acid HBr - hydrobromic acid HI – hydroiodic acid (also known as hydriodic acid) HClO4 - perchloric acid
  20. 20. A given substance is an acid if inaqueous solution the substanceC. turns litmus paper redAn acid is a substance whose water solution exhibits the following properties: 1. turns litmus paper red 2. has a sour taste 3. neutralizes bases 4. reacts with active metals to produce hydrogen gas
  21. 21. Pure water is neutral.TRUEIn pure water, (H3O+) or more often represented as [H+], is 1.0x10-7 M, and the [OH-] is also 1.0x10-7 M. since [H+] is equal to [OH-], then water is considered neutral.
  22. 22. Which is NOT a base?B. BF3BF3 is a Lewis acid. Mg(OH)2, NH3 and KOH are bases. H2O is amphoteric, it can act as an acid or a base.
  23. 23. Which of the following statements isTRUE for all bases?D. Bases turn phenolphthalein from colorless to pink.Solutions of bases have slippery, soapy feeling and a biting, bitter taste. Like acids, bases also react with indicators. Bases turn red litmus blue, turn methyl orange from red to yellow, and turn phenolphthalein from colorless to pink. Bases neutralize acids to form water and a salt. Bases have hydroxide ion concentration.
  24. 24. The color of phenolphthalein in anacid is colorless.TRUEPhenolphthalein is often used in titrations, it turns colorless in acidic solutions and pink in basic solutions. If the concentration of indicator is particularly strong, it can appear purple.
  25. 25. Indicators used in titration areadded toE. the acid or baseAn indicator is added to the titrand (either an acid or a base), whose concentration is unknown.
  26. 26. A standard solution is oneD. with known concentrationA standard solution is a solution containing a precisely known concentration of an element or a substance. Standard solutions are used to determine the concentrations of other substances, such as solutions in titrations.
  27. 27. NH4+ is a Lewis base.FALSENH4+ is a Lewis acid. It donates one proton (H+). H2O + NH4+ <--> H3O+ + NH3
  28. 28. Calculate the pH of 0.0001 M HClsolution.D. 4Given: [H+] = 0.0001 M [H+] = 10-4Solution: pH = - log [10-4] pH = - (-4) pH = 4
  29. 29. Blood has an acidic pH.FALSEThe pH of blood is 7.35 – 7.45. pH < 7.00 acidic solution pH = 7.00 neutral solution pH > 7.00 basic solutionTherefore, blood has a slightly basic pH.
  30. 30. An acid found in the stomach isC. HCLHydrochloric acid, normally found in the gastric juices, is necessary for the proper digestion of proteins in the stomach.
  31. 31. A pH of 2 is more acidic than a pOHof 12.FALSEpOH is a measure of the concentration of hydroxide ions. pOH = 14 – pH pOH = 14 – 2 pOH = 12Therefore, a pH of 2 is equal to a pOH of 12.
  32. 32. When the hydrogen ion (H+) is indicatedin connection with its watersolution, the ion represented isD. H3O+Hydronium ion (H3O+) is responsible for the observed properties of acids in water. For the sake of simplicity, H+ is often use instead of the more accurate H3O+. For aqueous solutions, whenever H+ is written, it should be understood as H3O+.

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