Section 3: Acids, Bases, and Salts in the Home Preview Key Ideas Bellringer Cleaning Products Personal-Care and Food Products

Key Ideas Why are cleaning products added to water? What are some household products that contain acids, bases, and salts?

Bellringer Many acids, bases, and salts are used daily in our homes. Based on what you know about the properties of acids, bases, and salts, answer the following questions. 1. Some green apples are particularly sour. Is this likely to be due to an excess of an acid or a base? 2. Baking soda reacts with vinegar. Is baking soda an acid or a base?

Bellringer , continued 3. Given that one approach to an upset stomach is to take an antacid, are the chemicals secreted into the stomach for digestion likely to be acids or bases? 4. Drain cleaners that contain lye react with fatty acids in clogs. Given that, are drain cleaners that contain lye acids or bases 5. Many common window cleaners contain ammonia, a base. Given that, is most dirt on windows slightly acidic or slightly basic?

SPS6.e Determine whether common household substances are acidic, basic, or neutral.

EQ: How acidic or basic are some common household substances?

Personal-Care and Food Products What are some household products that contain acids, bases, and salts?

9-3-1 Personal-Care and Food Products Many healthcare, beauty, and food products in your home, in addition to cleaners, contain acids, bases, or salts.

9-3-2 Personal-Care and Food Products, continued Many healthcare products are acids or bases.

9-3-3 Personal-Care and Food Products, continued Vitamin C is ascorbic acid.

9-3-4 Personal-Care and Food Products, continued Sodium hydrogen carbonate and magnesium hydroxide (milk of magnesia) are antacids.

9-3-5 Personal-Care and Food Products, continued antacid: a weak base that neutralizes stomach acid

9-3-6 Personal-Care and Food Products, continued The pH of most shampoos is between 5 and 8.

9-3-7 Personal-Care and Food Products, continued A shampoo that is too basic can cause strands of hair to swell.

9-3-8 Personal-Care and Food Products, continued Acids can be used as antioxidants.

9-3-9 Personal-Care and Food Products, continued Antioxidants prevent oxygen from reacting with molecules.

9-3-10 Personal-Care and Food Products, continued Vitamin C and citric acid are antioxidants.

9-3-11 Personal-Care and Food Products, continued Vinegar or citrus juices make acidic marinades that can tenderize meats.

9-3-12 Personal-Care and Food Products, continued Bacteria convert lactose, a sugar in milk, into lactic acid.

9-3-13 Personal-Care and Food Products, continued Many drain cleaners contain sodium hydroxide.

Why are cleaning products added to water?

Water does not mix with grease or oil. 9-3-14 Cleaning Products Water does not mix with grease or oil.

9-3-15 Cleaning Products Cleaning products improve water’s ability to clean because they help water mix with oily substances.

9-3-16 Cleaning Products Soap can dissolve in both oil and in water and allows oil and water to form an emulsion that can be washed away by rinsing.

9-3-17 Cleaning Products, continued Detergents and soaps are bases.

9-3-18 Cleaning Products, continued Detergent: a water-soluble cleaner that can emulsify dirt and oil

9-3-19 Cleaning Products, continued Soap forms soap scum when it combines with Mg2+, Ca2+, and Fe3+.

9-3-20 Cleaning Products, continued Soap scum is an insoluble salt.

9-3-21 Cleaning Products, continued Detergents do not form scum.

9-3-22 Cleaning Products, continued The hydrocarbon chains in detergents come from petroleum products.

9-3-23 Cleaning Products, continued The hydrocarbon chains in soap come from animal fats or plant oils.

9-3-24 Cleaning Products, continued Many household cleaners contain the weak base ammonia.

9-3-25 Cleaning Products, continued Bleach: a chemical compound used to whiten or make lighter

9-3-26 Cleaning Products, continued Household bleach is a solution of a strong base, sodium hypochlorite (NaOCl).

9-3-27 Cleaning Products, continued Bleach is also a strong disinfectant.