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TOC: Compounds

TOC: Compounds. I: Starter. Before starting the problems, get two mini-grids and glue/tape them into your journal. Be sure and grid your answers on them. Write down the problems and solve them.

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TOC: Compounds

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  1. TOC: Compounds

  2. I: Starter • Before starting the problems, get two mini-grids and glue/tape them into your journal. Be sure and grid your answers on them. Write down the problems and solve them. • #1 --- A marble with a mass of 7 grams is dropped into a graduated cylinder which is already filled with 40 mL of water. The water rises to 50 mL. What is the density of the marble? • #2 --- A cube with a side length of 5 cm has a mass of 125 grams. What is its density. • GRID BOTH ANSWERS!!!!!!!!!

  3. II: Practice What is a Compound??

  4. Look at the 2 beakers and write down 2-3 observations. • Even though the 2 substances look the same, they have very different properties. • The substance in beaker “X” is drinkable. • The substance in “Y” is not and in its pure form could be fatal!! • Both substances may be used to clean wounds but one is more effective than the other.

  5. Look at these 2 chemical formulas. H2O H2O2 Hydrogen peroxide water What is the difference in the chemical symbols for these two substances? How many elements are in each formula?

  6. A compound is made from 2 or more elements that are chemically combined and is not separated by physical means into other substances. • A compound has different properties than the original elements that formed it. Na is sodium which is a metal that explodes in water. Cl is chlorine which is a toxic gas. When they combine (NaCl) they make table salt!

  7. A chemical formula is a combination of chemical symbols showing the atoms of which a substance is made and their proportions. C6H12O6 This is called a subscript!! It shows how many atoms are present in the formula!

  8. A molecule is the smallest particle of a compound that can exist on its own and keep its properties.

  9. III: Application: Copy chart in your journal

  10. III: Application: Identify the elements in the last column

  11. III: Application: Match the name with the correct formula in the first column

  12. III: Application: Match the name with the correct formula in the first column

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