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ANSWERS to Lesson 1.2.1 Questions AND the HMK Questions ( pg 24/25)

ANSWERS to Lesson 1.2.1 Questions AND the HMK Questions ( pg 24/25). 1. Examine the contents of the vials and their labels. Write down at least six patterns you notice. For example: every substance with the word sodium also has the symbol Na. Anything with copper has Cu

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ANSWERS to Lesson 1.2.1 Questions AND the HMK Questions ( pg 24/25)

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  1. ANSWERS to Lesson 1.2.1 Questions AND the HMK Questions (pg 24/25)

  2. 1. Examine the contents of the vials and their labels. Write down at least six patterns you notice. For example: every substance with the word sodium also has the symbol Na. Anything with copper has Cu #s are always after letters in formulas Both acids were clear liquids All OH were hydroxides All gases have a little (g) Anything with (aq) is a watery substance

  3. The following symbols represent elements. Identify each element. a) Cu b) H c) Zn Zinc Hydrogen Copper

  4. How would you translate the following words into chemical symbols? a) sulfate b) nitrate c) Hydroxide OH NO3 SO4

  5. 4. Compounds are substances that are made up of more than one element. On your data table (in the left hand margin) place a “C” next to the number of each vial that contains a compound. Vial 1, Vial 2, Vial 3, Vial 5, Vial 6, Vial 7, Vial 9, Vial 11, Vial 12, Vial 13, Vial 14, Vial 15, Vial 16, Vial 17

  6. 5. What do you think the symbols (g), (l), and (s) stand for? Solid, Liquid, Gas

  7. 6. How would you write the chemical formula for ice? H2O (s)

  8. 7. What do all the substances labeled (aq) look like? What do you think the symbol (aq) might stand for? They are all a colorful or colorless liquid. Aq = Aqueous = a solid dissolved in water!

  9. Making Sense Question: When you turned the penny silver on the first day of class, you used zinc, Zn (s), and sodium hydroxide, NaOH (aq). Do you think the penny was coated with silver, Ag (s)? Explain your reasoning. No because we never added any silver (Ag)!

  10. Check-in: Imagine you find a vial that is labeled Na2SO4 (aq). List at least three things the label tells you abut what is in this flask. It is a liquid. It has sodium. It has sulfur. It has oxygen. It has “sulfate”.

  11. 1. How many elements are represented by the chemical formula for sodium nitrate, NaNO3? Name them. 3 different elements: Sodium, Nitrogen, Oxygen

  12. 2. What is the difference between CuSO4 (s) and CuSO4 (aq)? One is a solid, the other is the same solid but dissolved in water.

  13. 3. If salt, NaCl (s) is dissolved in water, H2O (l), how would you write the chemical formula for the resulting salt water solution? NaCl (aq)

  14. 4. If sugar, C6H12O6 (s), is dissolved with water, H2O (l), how would you write the chemical formula for the resulting sugar water solution? C6H12O6 (aq)

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