When there is food in the stomach the pH can raise to as high as 4-5. After the food leaves the stomach bicarbonate ions are secreted to neutralize and alkalinize the mixture. The pH of the small intestine is approximately 8. As far as how long food stays in your stomach it depends on what that food is.
Rating Newest Oldest. Best Answer: B Malleability A chemical property is one you can observe during a chemical reaction. Malleability really has nothing to do with chemical reactions, and afterwards you still have the same substance, nothing is chemically changed. Source(s): Col. S Â· 7 years ago.
With chemical properties the chemical identity of the substance is changed, this is not the case with physical properties. With chemical properties the structure of the material changes, while the structure does not change in the case of physical properties. A chemical reaction occurs before a chemical property becomes evident, while no chemical reaction is needed for a physical property to become visible. Chemical properties, unlike physical properties, can be used to predict how substances will react. Table comparing physical and chemical properties