1. Solutions, Acids, and Bases Acids, Bases, and Salts IQRA MODEL SCHOOL, TANDUR.

2. An ACID is a substance that produces hydrogen ions in a water solution. Acids Acids, Bases, and Salts When an acid dissolves in water, H + ions interact with water molecules to form H 3 O + ions, known as hydronium ions. Acids taste sour. Acids are corrosive. An INDICATOR is an organic compound that changes color in acids and bases. IQRA MODEL SCHOOL, TANDUR.

3. An acid forms H 3 O+ due to the excess of ________ ions? A. H+ B. H- C. OH-

4. Acids have excess ______ ions? A. hydroxide B. water C. hydronium

5. A hydronium ion, H 3 O+ contains _______. A. 3 helium atoms and 1 oxygen atom B. 3 hydrogen atoms and 1 oxygen atoms plus something else C. 1 hydrogen atom and 3 oxygen atoms D. 3 hydrogen atoms and 1 oxygen atom

6. Acids, Bases, and Salts An indicator is an organic compound that changes color in acids and bases. Litmus is an example of an indicator Litmus paper is paper soaked in litmus Sometimes called pH paper, or pHydronium paper INDICATORS IQRA MODEL SCHOOL, TANDUR.

7. An acid will change the color of litmus, an indicator. A. True B. False

8. Many foods contain acids. Common Acids Acids, Bases, and Salts IQRA MODEL SCHOOL, TANDUR.

9. Bases can be defined in two ways. Bases Acids, Bases, and Salts Any substance that forms hydroxide ions, OH ― in a water solution is a base. A base is any substance that accepts H+ from acids. IQRA MODEL SCHOOL, TANDUR.

10. A base has an excess of _____ ions? A. H 3 O+ B. OH- C. H 2 O

11. Bases have excess ______ ions? A. hydroxide B. water C. hydronium

12. A hydroxide ion, OH- has ____. A. 1 oxygen atom, 1 hydrogen atom with another element missing B. 1 oxygen atom and 1 hydrogen atom C. 1 oxygen atom and 1 helium atom D. this ion does not exist.

13. In solution, bases feel slippery and have a bitter taste. Properties of Bases Acids, Bases, and Salts 3 3 Bases react with indicators to produce changes in color. IQRA MODEL SCHOOL, TANDUR.

14. Common Bases Acids, Bases, and Salts You probably are familiar with many common bases because they are found in cleaning products used in the home. IQRA MODEL SCHOOL, TANDUR.

15. Soaps and detergents are ____. A. acids B. bases

16. When an acid dissolves in water, the negative areas of nearby water molecules attract the positive hydrogen in the acid. Solutions of Acids and Bases Acids, Bases, and Salts Dissociation of Acids The acid dissociates into ions and the hydrogen atom combines with a water molecule to form hydronium ions. IQRA MODEL SCHOOL, TANDUR.

17. Dissociation of Bases Acids, Bases, and Salts The base dissociates into a positive ion and a negative ion. Unlike in acid dissociation, water molecules do not combine with the ions formed from the base. The positive areas of nearby water molecules attract the - OH of the base. IQRA MODEL SCHOOL, TANDUR.

18. H 3 O+ + OH-  _______ A. H2O B. 2H 2 O C. No reaction occurs

19. Neutralization is a chemical reaction between an acid and a base that takes place in a water solution. NEUTRALIZATION Acids, Bases, and Salts IQRA MODEL SCHOOL, TANDUR.

20. Acid-Base Reactions Acids, Bases, and Salts acid + base salt + water A SALT is a compound formed when the negative ions from an acid combine with the positive ions from a base. IQRA MODEL SCHOOL, TANDUR.

21. What does an acid produce in solution? A. H 3 O- B. H 3 O+ C. H+ D. H- Question 1

22. What does an acid Form in solution? A. H 3 O- B. H 3 O+ C. H+ D. H- Question 1B

23. Section Check Question 1 What does an acid produce in solution? An acid produces hydrogen ions in solution, which interact with water molecules to form hydronium ions. Answer IQRA MODEL SCHOOL, TANDUR.

24. Which changes color in acids and bases? A. ammonia B. antacid C. detergent D. litmus

25. Section Check Answer The answer is D. Litmus is an indicator that turns blue in bases and red in acids. IQRA MODEL SCHOOL, TANDUR.

26. Any substance that forms _______ in a water solution is a base. A. H 3 O - B. OH - C. H ++ D. H 2 O

27. Section Check Answer The answer is B. A base is any substance that forms hydroxide ions in water. IQRA MODEL SCHOOL, TANDUR.