Monday, Dec. 9Monday, Dec. 9thth: “A” Day: “A” DayTuesday, Dec. 10Tuesday, Dec. 10thth: “B” Day: “B” Day

AgendaAgendaHomework questions/CollectHomework questions/CollectSec. 4.3 quiz: “Trends in the Periodic Table”Sec. 4.3 quiz: “Trends in the Periodic Table”Check Flame Test lab write-upsCheck Flame Test lab write-upsFlame Test lab discussionFlame Test lab discussionConduct Lab, complete analysis and conclusion questionsConduct Lab, complete analysis and conclusion questionsLab will be Lab will be due next timedue next time!!Movie: “Hunting theMovie: “Hunting the Elements”Elements”

Homework Sec. 4.3 review, pg. 141: #1-11

Questions?

Problems?

4.3 Quiz:“Trends in the Periodic Table”

You may use your notes, your book, and a periodic table to complete the quiz on your own…

Don’t do #9 or #10

Use the force!

Flame Test Lab DiscussionThe different color flames you will see in the

“Flame Test” lab are caused by different metals in the solutions.

Remember, most of the elements on the periodic table are metals.

Metals are listed 1st when naming compounds.Non-metals are found on

the right-hand side of the table.

Flame Test Lab DiscussionIdentify the metals in the solutions you will be

testing in today’s lab:

1. CuSO4

2. K2SO4

3. Li2SO4

4. Na2SO4

5. NaCl6. SrCl2

Flame Test Lab HintsFlame Test Lab HintsTo test the NaCl crystals, remove a wooden splint To test the NaCl crystals, remove a wooden splint

from the beaker of distilled water and dip it into from the beaker of distilled water and dip it into the NaCl crystals so the crystals will stick to the the NaCl crystals so the crystals will stick to the splint.splint.

The cobalt glass is used to help “filter out” the The cobalt glass is used to help “filter out” the bright yellow flame caused by sodium (Na) metal. bright yellow flame caused by sodium (Na) metal. When the bright yellow flame is filtered out, it When the bright yellow flame is filtered out, it may be easier to see other, less bright colors in may be easier to see other, less bright colors in the flame.the flame.

Hint: Neither of the 2 unknown samples is a mixture…

Lab: “Flame Tests”Safety Items

We will be using bunsen burners so hair must be TIED BACK!

The lights in the lab will be turned OFF so that you can see the flame colors more easily – be careful and be descriptive!

Don’t burn the wooden splint – you only want to see the color made by the metal solution as excited electrons fall back to lower energy states.

Put the splint into the “used splint beaker” when you’re done with the test.

Lab: “Flame Tests”Be a real scientist! If you’re not sure about the

unknowns, go back and test them side-by-side with the sample that you think it might be!

In the Analysis section, question #1: Organizing Data, just write “see data table” for your answer.

Remember that all lab questions need to be answered in COMPLETE SENTENCES!

Be safe and haveCompleted lab will be due next time!

Movie: “Hunting the Elements”

You do not have to take notes on the movie, but I do expect you to stay awake and pay attention…