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.
Report Abuse. Physical property is a non-chemical change. For example, water evaporating or freezing is a physical change. Only the apperance is changing...but whether it's solid, liquid, or vapor, it's still H2O. Chemical properties refer to a substance's ability to react with another substance. For example, a chemical property of gasoline is that it burns with oxygen and forms CO2 and H2O. This is a chemical change. When you burn gas, the products are substances that are different than what you started with. The Terminator Â· 9 years ago.