Question 1) For each of the following values, identify the number of significant digits of the value. Question 2) For each of the following...
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Question 1)

For each of the following values, identify the number of significant digits of the value.

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Question 2)

For each of the following sentences, select the word that completes correctly the statement about pH, pOH, hydronium ion concentration, or hydroxide ion concentration.


  1. In a neutral solution, the [H3O+(aq)] is (greater than or equal to or less than) 1 x 10-7 mol/L.
  2. A solution with a pH (above 7 or of 7 or below 7) is acidic. The closer the pH value is to (0 or 7 or 14) , the more acidic it is.

Question 3)

For each of the following pH values, provide the correct corresponding pOH value. Remember that answers must be provided to the correct number of significant digits..


  1. pH value of 1.4 will have a pOH value of:
  2. pH value of 4.4 will have a pOH value of:


Question 4)

For each of the following pOH values, provide the correct corresponding pH value. Remember that answers must be provided to the correct number of significant digits.


  1. pOH value of 8.1 will have a pH value of:
  2. pOH value of 2.78 will have a pH value of:

Question 5)

During a Chemistry 20 lab exercise, two solutions are compared. Solution A has a pOH of 2.65 and Solution B has a pOH of 5.65. The students are asked to complete the following statements.


  1. Solution A has a (higher or lower) hydroxide ion concentration compared to Solution B.
  2. Solution A has a (higher or lower) hydronium ion concentration compared to Solution B.
  3. Solution A has a (greater or lesser) hydroxide ion concentration than solution B has by a factor of (0.001 or 3 or 100 or 1000)
  4. Solution A has a (higher or lower) pH compared to Solution B.
  5. Solution A has (more or less) acidic properties compared to Solution B.


Question 6)

For each of the following values, classify the substance as acidic, basic, or neutral.

  1. A solution with a pH of 9.7 would be classified as - (acidic, basic, or neutral)
  2. A solution with a pOH of 13.54 would be classified as - (acidic, basic, or neutral)
  3. A solution with a [OH-(aq)] of 9.32 x 10-13 mol/L would be classified as - (acidic, basic, or neutral)
  4. A solution with a [H3O+(aq)] of 8.3 x 10-11 mol/L would be classified as - (acidic, basic, or neutral)

Question 7)

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Question 8)

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Question 9)

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Image transcriptions

Use the following information to complete the statement below. Solution Information Provided PH = 12.4 2 [H;O+(aq)] = 1.20 x 10-2 mol/L 3 [OH (aq)] = 2.22 x 10-6 mol/L 4 POH = 8.4 The four solutions in order from most acidic to least acidic are PUB

Use the following information as a guide to help answer the next three questions, Your answer MUST be in the same format. Indicators can be used to help approximate the ph of a solution based on the indicator colour Here is an example of how to word the pH approximation for bromothymol blue. Indicator Colour pH approximation Yellow 6.0 and below Green between 6.0 and 7.6 Blue 7.6 and above A Chemistry experiment is done where the pH of various solutions are tested, using indicators. The colours of indicators are recorded as shown below. Using the method outlined above in the example of bromothymol blue, indicate what the colours of the indicators tell us about the pH approximation of the solution. Values and wording are very important, so be precise. Be sure to word your ph approximation as outlined in the example.

A student is asked to design an experiment that uses indicators to identify which of three unknown solutions labelled X, Y, and Z have pH values of 1.3, 5.7, and 6.9. The student must select a maximum of four indicators from the following list to perform the experiment. 1. orange IV 2. phenolphthalein 3. bromocresol green 4. alizarin yellow R 5. bromothymol blue 6. chlorophenol red 7. cresol red B. indigo carmine The indicators that will allow the student to identify successfully the ph of the unknown solutions are and List the numbers from lowest to highest.

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Subject: Chemistry, Science
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