select the correct answer. samuel adds a teaspoon of salt to a glass of water. he notices that the salt…
select the correct answer. samuel adds a teaspoon of salt to a glass of water. he notices that the salt disappears. samuel takes a sip to discover that the water tastes salty. what kind of change has occurred? a. its a chemical reaction because a new substance has formed. b. its a physical change because the water and the salt kept their original properties. c. its an example of synthesis because two substances reacted to give one substance. d. its a chemical reaction because the water now tastes salty but originally did not.
Answer
Brief Explanations:
When salt (sodium - chloride) is added to water, it dissolves. This is a physical change as no new chemical substances are formed. The salt ions separate in water but can be recovered by evaporating the water, meaning the salt and water retain their original chemical properties. A chemical reaction would involve the formation of a new substance with different chemical properties. Synthesis is a type of chemical reaction where two or more substances combine to form a new compound. The taste change is just a result of the salt being dispersed in the water, not a sign of a chemical reaction.
Answer:
B. It's a physical change because the water and the salt kept their original properties.