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Magazine Problem 2
When an acid is dissolved in water, what ion does the water form?
Problem 4
What does it mean to say that an acid is strong in aqueous solution?
Problem 5
Why does a solution of a strong acid conduct electricity better than a solution of a weak acid having the same concentration?
Problem 8
What is true about the relative concentrations of hydronium and hydroxide ions in an acidic solution? How about a neutral solution? A basic solution?
Problem 9
What does the pH of a solution indicate?
Problem 10
As the hydronium ion concentration of a solution increases, does the pH of the solution increase or decrease?
Problem 17
Write an equation for the half reaction in which a potassium atom, K, is oxidized.
Problem 20
What is the purpose of the salt bridge in a voltaic cell?
Problem 28
What are some differences between corrosion and combustion?
Problem 32
Make a concentrated solution of red cabbage extract by boiling a cup of shredded red cabbage in a cup of water for about 5 minutes. Pour this extract into a large transparent container, such as a vase or a 2-L plastic bottle with the top cut off. Add a tablespoon of white vinegar to acidify the solution. Ask yourself or a classmate what would happen to the \(\mathrm{pH}\) of this solution if you were to fill the container with plain water. Would the \(\mathrm{pH}\) go up or down, or stay the same? Test your prediction. As you dilute the solution, the color grows lighter, but what happens to its hue? How can adding plain water change the \(\mathrm{pH}\) of a solution? Might plain water be used to make this solution alkaline?
