Acids, Bases, & Salts

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Example

H2SO4 + NaOH  NaHSO4 + H2O

Slide 27

Digestion and pH

Digestion-process by which foods are broken down into simpler substances.

Mechanical digestion-physical process in which food is torn apart (mouth)

Chemical digestion- chemical reactions in which large molecules are broken down into smaller molecules. (stomach and small intestines)

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pH in the Digestive System

Mouth-pH around 7. Saliva contains amylase, an enzyme which begins to break carbohydrates into sugars.

Stomach- pH around 2. Proteins are broken down into amino acids by the enzyme pepsin.

Small intestine-pH around 8. Most digestion ends. Small molecules move to bloodstream toward cells that use them

Slide 29

mouth

esophagus

stomach

small intestine

large intestine

Digestive system

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Acids, Bases, and Salts The End