Intro to the Mole

Think About It What do the words pair and dozen have in common?

I Can… Determine how many moles or particles are present in a given problem using dimensional analysis Define what a mole is

Agenda What is a Mole? Calculator Stuff Practice Exit Slip

Question How many molecules are in the beaker of salt?

Mole Unit of measurement in Chemistry 6.02 X 1023 Very large number!!! 602 000 000 000 000 000 000 000 Also known as Avogadro’s number

http://ed.ted.com/lessons/daniel-dulek-how-big- is-a-mole-not-the-animal-the-other-one

1 mole of dollars: $602,000,000,000,000,000,000,000 US National Debt: $19,975,332,990,000 World Population: 7,484,428,900

If I have 1 mole of Jolly Ranchers, how many do I have?

If I have 1 mole of Sodium Chloride, how many particles do I have?

If I have 6.02 x 1023 atoms of Nitrogen gas, how many moles do I have?

Calculator Magic Since we are using scientific notation, there is a specific way to type into your calculator You NEED a scientific calculator If using your phone, you will need to download a scientific notation app

Try it… 2.52 x 1025 / 6.35 x 1011 Correct Answer: 3.97 x 1013

Correct Answer: 3.97 x 1013 Most common incorrect answer: 3.97 x 1035

Notes for Dimensional Analysis Units MUST Cancel Out Diagonally UNITS, UNITS, UNITS!!!!!!!!!! With set-up, as well as the answer 

Setting Up a Mole Problem How many atoms are in 2.5 moles of Potassium?

Try on Your Own In your groups, work on the 4 practice problems from your notes on the giant whiteboard **If you finish early before we go over them, try the challenge problems

Try on Your Own How many molecules are in 5.52 moles of water? How many atoms are in 7.41 moles of sodium? How many moles are in 1.86 x 1024 molecules of potassium fluoride? How many moles are in 8.54 x 1022 atoms of aluminum?

Tips DO NOT memorize how to set up an equation- think about it where the units should be to cancel out AKA: Don’t think when converting from moles to particles, you should have…

I’ll leave you with this…

Making a New Counting Unit 1 DART = 4

Sooo… A DART of oranges will have ___________ oranges

A DART of iron atoms has ___________ atoms of iron

How DARTS do I have if I have 4 water molecules?

Say I want to know how many… How many Potassium atoms are in 5.36 darts? **Need to show how to do this in dimensional analysis

Try In Your Groups In your groups, work on the 4 practice problems from your notes on the giant whiteboard

How many particles of silver are in 15.3 DARTS? How many DARTS are 24 Caramels? How many DARTS are 48.45 Sodium Chloride molecules? How many molecules of water are in 0.25 DARTS? **Set up in Dimensional Analysis