CHEMISTRY: Happy snow week! Here’s the lesson for Wednesday. It’s the LAST of the notes from chapter 8. At the end is a great review of completing and balancing equations. Also be sure and check the syllabus to find out about the optional homework assignment that will be great help if you’re having trouble predicting products of reactions.
So guess what happens when a gummy bear falls into a test tube of molten potassium chlorate?! Click on the video below to find out! Do you reckon that it’s a physical change or a chemical change? Why do you think?
Remember these steps when you are completing chemical equations: #1 – write the correct formulas; #2 – ask yourself what type of rxn it is; #3 – find the rule that applies and go for it! Don’t forget also that if you answer single replacement to #2 (or the synthesis or decomposition of a metal oxide!) you’d better check the activity series first!! Good luck!
Q – Why are elements near the bottom of the activity series often found free in nature?
A – It is because these elements are not very reactive and won’t react with anything in nature. Therefore, they are found freely in their natural state.
Q- What do oxyacids decompose to form
A- A non metallic oxide and H2O
Q- Why are elements that are near the top of the activity series rarely found in nature?
A- The elements are very reactive and they would react with most things around them. Ex. they may react with oxygen, etc.
Q- why are some elements more reactive than others
A- each elements specific electrons
Q-what elements replace hydrogen in water
A-all elements above it