Click on the button below ("Buffalo Wild Wings Manager Dies After Chemical Incident") and read the article. As you read the article, answer the following questions:
- What happened?
- What was mixed together?
- What was produced?
- Why is this article important?
When using cleaning products, it is important to understand the chemistry behind what occurs when certain chemicals are mixed together. To be able to predict what will happen when certain chemicals are mixed, you need to understand the parts of a chemical equation. Watch the following video.
When determining what products will form when chemicals are mixed, you need to know how to write chemical formulas and names. To begin, let's discuss ions. An atom is neutral when the number of protons equal the number of electrons in the atom. For example, if you have 5 protons which are positive and 5 electrons which are negative, the overall charge of the atom is 0 (5-5 = 0), but this is not always the case. If you have more or less electrons than protons, then the atom has a charge, and we call this an Ion.
- Ion: An atom that has a positive (+) or negative (-) charge
- If an atom gains an electron it becomes an anion (negative charge)
- If an atom loses an electron it becomes a cation (positive charge)
- Let's look at sodium. A neutral atom has 11 protons, and 11 electrons. If we have a sodium atom with a +1 charge, it must have lost an electron, and it now has 11 protons and 10 electrons, so sodium will have a plus 1 charge (see picture to the right). We can use the following equation:
- Number of electrons = Atomic Number- Charge of atom
- Let's look at chlorine. A neutral atom has 17 protons, and 17 electrons. If we have a chlorine atom with a -1 charge, it must have gained an electron, and has 17 protons and 18 electrons, so chlorine will have a minus 1 charge (see picture to the right). We can use the following equation:
- Number of electrons = Atomic Number - Charge of atom
We can use the periodic table to determine what the charge will be on each element.
Watch the following videos to learn how to write chemical formulas and names for ionic compounds and covalent compounds.