SOLUTION: The percentage of each substance in su ed as follows ch a mixture can
ID: 565460 • Letter: S
Question
SOLUTION: The percentage of each substance in su ed as follows ch a mixture can be calculat- % Component = mass component in grams × 100 -mass sample in grams Therefore, the percentage of Sio, in this particular sample micture is %so. 1.25 g × 100 SiO2=-2.56 g = 48.8% Before beginning this experiment in the laboratory, you should be able to answer the following questions: Classify each of the following as a pure substance or a mixture; if a mix- ture, state whether it is heterogeneous or homogeneo (b) tomato juice (c) marble (d) seawater (e) iron 1. us: (a) concrete 2. Suggest a way to determine whether a colorless liquid is pure water or a salt solution without tasting it. 3. 4. 5. 6. 7. What distinguishes a mixture from an impure substance? Define the process of sublimation. How do decantation and filtration differ? Which should be faster? Why should one never weigh a hot object? How does this experiment illustrate the principle of conservation of matter? found to contain 1.05 g of SiO2, 0.69 g of cellulose, percentage of SiO2 in and 2.17 g of calcium carbonate. What is the this mixture? How could you separate a mixture of zinc chloride and cyclohexane? How could you separate zinc chloride from SiO,? 9. 10. found that her mixture was 13% NH,CI, 18% NaCl, and 75% her calculations are correct, what did she most likely SiO2. Assuming do incorrectly in her experiment? Why is the NaCl extracted with water three times as opposed to only 12. once?Explanation / Answer
1. Tomato juice= heterogeneous mixture, because it is chemically not a pure substance.
Concrete= heterogeneous mixture,
Marble = heterogenous mixture, because made up of two or more different
Seawater = homogenous mixture
Iron = pure substance.
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