Phenolphthalein is used in this experiment to study the equilibrium of the weak base ammonia in water. Phenolphthalein itself is a weak acid, which exists in equilibrium in solution. The protonated (acid) form of Phenolphthalein is colorless, whereas the conjugate base form of Phenolphthalein is colored (fuchsia). Use a scientific encyclopedia or online reference to find the formula of Phenolphthalein, its chemical name, and at what pH Phenolphthalein changes from the colorless form to the pink form

Phenolphthalein is used in this experiment to study the equilibrium of the weak base ammonia in water. Phenolphthalein itself is a weak acid, which exists in equilibrium in solution. The protonated (acid) form of Phenolphthalein is colorless, whereas the conjugate base form of Phenolphthalein is colored (fuchsia). Use a scientific encyclopedia or online reference to find the formula of Phenolphthalein, its chemical name, and at what pH Phenolphthalein changes from the colorless form to the pink form

Pushing Electrons

4th Edition

ISBN:9781133951889

Author:Weeks, Daniel P.

Publisher:Weeks, Daniel P.

Chapter3: Mechanisms

Section: Chapter Questions

Problem 31EQ: The reaction just described is reversible. Deprotonation of the conjugate acid of an organic base by...

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The reaction just described is reversible. Deprotonation of the conjugate acid of an organic base by water provides another example of simultaneous making and breaking of sigma bonds. Thus, in the deprotonation of anilinium ion by water, the base is water, which has unshared electrons on the ________ atom. The acid is ________ ion. A pair of ________ electrons on the oxygen atom of water is pushed toward the ________ atom. Simultaneously, the pair of ________ electrons between the hydrogen and ________ atom of the anilinium ion is pushed toward the ________ atom. Thus, the oxygen- ________ sigma bond is made and a hydrogen- ________ sigma bond is broken. The nitrogen atom, which possessed a positive charge, is now ________, and the oxygen atom, which was neutral, now possesses a formal ________ charge.
Select the correct answers: “Ocean acidification is a process that occurs when atmospheric carbon dioxide dissolves in the ocean and is subsequently converted into (methane; carbonic acid; carbonate ions; sodium carbonite) . This then causes the pH of the ocean to (increase; decrease; fractionate; multiply) and become more acidic.”
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In the equilibrium between methylammonia and the methylammonium ion, which is the ionized form and what it its net charge?
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Explain why the neutralization reaction of a weak acid and a strong base gives a weekly basic solution. A) The reaction of weak acids or bases with strong acids and bases change the Kw of water, leading to a basic solution at equilibrium. B) The excess strong base creates the basic solution. C) The weak acid gets converted to its conjugate base, which then reacts with water. D) The weak acid gets protonated and the protonated weak acid then deprotonates in water. E) This is a trick question – the neutralization of weak acid by base has to yield a neutral solution, not a basic one – that’s why it’s called a neutralization reaction.
Define the following terms. End point
Predicting acid or base strength from the conjugate Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. Explanation species F HCIO, C102 HIO HF OH H₂O IO Check relative pH of 0.1 M aqueous solution (Choose one) ▼ to 1 (lowest) (Choose one) ▼ (Choose one) 2 (Choose one) ▼ 4 7 Search S © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center A
Predicting acid or base strength from the conjugate Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. Explanation species CH₂COOH OH 103 CH3COO HONH, H₂O HIO3 HONH, Check relative pH of 0.1 M aqueous solution 2 8 (highest) 5 (Choose one) ▼ (Choose one) ▼ (Choose one) ▼ (Choose one) ▼ 3 ▬▬ Q Search X S 4 ?圖 l Ⓒ2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility
Predicting acid or base strength from the conjugate Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine making an 0.1 M solution of each species. Select 1 next to the species that makes the solution with the lowest pH. Select 2 next to the species that makes the solution with the next higher pH, and so on. Notice that some of the rankings have been filled in for you already. Also notice that water is on the list. For that particular case, just compare the pH of pure water to the pH of the other solutions. Note for advanced students: for all charged species, you may assume the necessary counterions act as neither acids nor bases. species CH₂CH(OH) COOH Explanation H₂O C6H5NH3 OH C6H5O CHẠNH, CHOK CH₂CH(OH)COO Check relative pH of 0.1 M aqueous solution (Choose one) 4 2 (Choose one) ▼ (Choose one) ▼ (Choose one) ▼ 3 5 Q Search X 1/5 3 - Allie V ?圖 allo Ar © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center…
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Natural goldenrod pigment is a yellow dye that changes to a bright red color in the presence of a basic solution and remains yellow in contact with an acidic or neutral solution. Peter is using goldenrod paper to test three solutions he prepared Because Peter wants his message to be clearly visible in a red background at the end of his investigation, in what sequence should he use the solutions to paint the paper? A Paint first with lemon juice and then with tap water. B Paint first with laundry detergent and then with tap water. C Paint first with laundry detergent and then with lemon juice. D Paint first with lemon juice and then with laundry detergent.