Question

homogeneous vs. heterogeneous mixtures
a homogenous mixture is a mixture where the composition is constant throughout. a heterogeneous mixture is a mixture where the individual substances remain distinct.
classify the following mixtures as either homogeneous (o) or heterogeneous (e).

1. ______ flat coca - cola®
2. ______ cherry vanilla ice cream
3. ______ salad dressing
4. ______ sugar
5. ______ soil
6. ______ black coffee
7. ______ sugar water
8. ______ beach sand
9. ______ pure air
10. ______ chunky spaghetti sauce
11. ______ fizzy coca - cola®
12. ______ aluminum foil
13. ______ city air (with smog)
14. ______ paint
15. ______ whole milk
16. ______ rubbing alcohol

Explanation:

Classify each substance by checking if its composition is uniform (homogeneous, O) or has distinct components (heterogeneous, E). Note: Pure substances (sugar, aluminum foil) are not mixtures, but follow the task's framing for classification.

Answer:

1. O (uniform composition, no visible separation)
2. E (distinct cherry/vanilla chunks)
3. E (separates into oil/water layers)
4. O (pure substance, uniform composition)
5. E (contains distinct particles like dirt, rocks)
6. O (uniform mixture of coffee and water)
7. O (sugar fully dissolved, uniform)
8. E (contains sand, shells, pebbles)
9. O (uniform mixture of gases)
10. E (has visible chunks of vegetables/meat)
11. O (uniform liquid, bubbles are temporary and uniform)
12. O (pure metal, uniform composition)
13. E (smog creates distinct, non-uniform particles)
14. O (uniform when mixed, no distinct layers)
15. O (uniform emulsion of fat in milk)
16. O (uniform mixture of alcohol and water)