Understanding Acids in Science

What are the general properties of acids?

• Acids have a sweet taste and are non-conductive.

• Acids have a sour taste, conduct electricity, react with bases, turn blue litmus red, and release H+ ions in solution.

• Acids do not react with bases and have a slippery feel.

• Acids turn red litmus blue and release OH- ions in solution.

How do acids taste?

• Sour

• Sweet

• Salty

• Bitter

What is the pH range of acids?

• 0 to 6.9

• 6.9 to 10

• 7 to 14

• -1 to 0

Name one common use of hydrochloric acid.

• Food preservation

• Water treatment

• Metal cleaning

• pH adjustment

What is sulfuric acid commonly used for?

• Sulfuric acid is commonly used in the production of fertilizers and in chemical manufacturing.

• Fuel for combustion engines

• Food preservative

• Cleaning agent for household surfaces

Identify a common acid found in citrus fruits.

• Acetic acid

• Lactic acid

• Ascorbic acid

• Citric acid

Where can you find acetic acid in everyday life?

• Baking soda

• Olive oil

• Lemon juice

• Vinegar, cleaning products, pickles, and sauces.

What is the chemical formula for citric acid?

• C6H12O6

• C6H8O7

• C7H10O7

• C5H6O5

How do acids react with metals?

• Acids react with metals to form only heat and no other products.

• Acids dissolve metals without any reaction.

• Acids react with metals to produce oxygen gas and water.

• Acids react with metals to produce a salt and hydrogen gas.

What is the role of acids in the human stomach?

• Acids are primarily used for nutrient absorption.

• Acids increase the pH level in the stomach.

• Acids aid in digestion and protect against pathogens.

• Acids neutralize stomach bile.