Janel’s class studied properties of matter and how matter can change. Janel decided she would do an experiment mixing baking sod
a and vinegar. Question:
Describe the properties of baking soda and vinegar, and explain the changes that Janel should see when she mixes the two types of matter.
•First, identify the physical state of matter of baking soda. Describe another property of baking soda.
•Next, identify the physical state of matter of vinegar. Describe another property of vinegar.
•Then, explain what Janel should see when she mixes the baking soda and vinegar.
•Describe the states of matter of the new materials that are formed.
•Explain how Janel can be certain a change has occurred.
1) baking soda (NaHCO₃ - sodium bicarbonate) is white, solid, crystalline salt or <span>appears as a fine powder. 2) vinegar is mixture of acetic acid (CH</span>₃COOH) and water (H₂O). Vinerar is colourless liquid with <span>sour taste and pungent smell. 3) Chemical reaction: </span>NaHCO₃ + CH₃COOH → CH₃COONa + CO₂ + H₂O. Jane should see bubbles of carbon(IV) dioxide. 4) sodim acetate (CH₃COONa) is solid and carbon dioxide (CO₂) is gas. 5) Jane can put burning match over reaction, the fire on the match is going to put out because of carbon dioxide.
A volcanic arc is a chain of volcanoes formed above a subducting plate, positioned in an arc shape as seen from above. Offshore volcanoes form islands, resulting in a volcanic island arc.
