LABORATORY EXERCISE 4 ACIDS, BASES, AND BUFFERS 5 IV. COMPREHENSION CHECK 1. Des
ID: 143738 • Letter: L
Question
LABORATORY EXERCISE 4 ACIDS, BASES, AND BUFFERS 5 IV. COMPREHENSION CHECK 1. Describe the properties of an acid. 2. Describe the properties of a base. 3. Explain how the concentration of hydrogen ions in a solution is related to the acidity of the solution. 4. What is pH? 5. What is a buffer? 6. How does a buffer work? 7. Describe how a pH indicator can be used to measure pH. 8. If the pH of a solution is 6, what is the concentration of hydrogen ions in moles/L? 9. What is the pH of a solution that has a hydrogen ion concentration of 1 x 10*moles/L? 10. A solution of hydrochloric acid (HCI) has a pH of 2. How much would you have to dilute this solution to obtain a solution that has a pH of 5?Explanation / Answer
(1)Acids are sour in taste
They convert blue litmus to red.
They produce H+ ions in a solution.
They produce salts on reaction with bases.
Acids are corrosive.
2.Base is slippery or soapy on touch.
They taste bitter.
They produce OH- ions in solution.
Bases react with acids to form salt.
They turn red litmus to blue.
3.Acids in a solution tend to dissociate and liberate hydrogen ions in a solution.So as the concentration of acid increases in the solution the hydrogen ion concentration also increase.
4. pH is a figure expressing acidity and alkanity of a solution on logarithmic scale where 7 indicates neutral and below 7 is acidic and above 7 is basic or alkaline.
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