Question

Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below. Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves. Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes. Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit. Which statement provides the best assessment of his tests?

Answer 1

Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes  provides the best assessment of his tests

Explanation:

• In the field of chemistry, to observe the chemical property of a substance, a chemical reaction has to take place. Based on the results of chemical reactions, the chemical properties of a substance be judged.

• In test 1, no chemical reaction will occur as there will be no change in the substances if sodium bicarbonate gets dissolved in water.

• In test 3, melting point is being observed which is a physical property. Hence, both test 1 and test 3 are not chemical tests.

• In test 2, a reaction is occurring which can be observed as something fizzes (which means a new compound has been formed). Hence, test 2 provides the best assessment.

Answer 2

Explanation:

Thank you,

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