The Magic

Thank you for your attention during class; it was a fun day.  This Thursday we will devote our science and art time to doing the Easter garden, so bring the basket or terra cotta saucer, or if you are unable to find something, text me (415 858 4191). Also, $5 for materials would be appreciated.

Some of you have asked when we will do the chemistry magic show; not till after spring break, perhaps the 23rd of April, but I want to order supplies by April 10th, so you need to submit your plan and materials request by then. I will order from hometrainingtools.com, so check there to see if what you need is available.   I want this presentation to be REALLY WELL PREPARED, with practice,and also safe.  Another site with good ideas is stevespanger.com.

Those of you who have not yet turned in the chemical reactions lab, I will be calling your parents--this is NOT OPTIONAL.  And it's not a test; if you need help, ask a friend or ask me. If you get to class at 9:10 I will give you my whole attention. If I still don't have it by next Monday, I will ask that you stay and do it during PE time.  If this stuff is hard, you need to be asking more questions.

Last of all, here's the new homework, a very long video, more like a movie, really, so get the family together, make popcorn, Chromecast it on your TV (but if that doesn't happen, you still need to watch it on your computer) and enjoy:

  The Magic of Chemistry (82 minutes)

Lastly, there will be no other new homework till after Easter, so enjoy Good Friday and Resurrection Sunday.  God is good!

studying

Those of you in class know the homework, to study in order to fill in the gaps for the quiz.

Look over the past blogs, the set of worksheets, past videos, the quizlet, the textbook, your notes, and come back on Monday ready to nail it.

for fun: (and to look out for, what makes reactions go faster?) watch the videos below.
and keep poking around for the Chemistry Magic demonstrations--email me with what you want to do and what you need.

Also, REMEMBER ABOUT THE EASTER GARDEN DISH OR BASKET -- 2-3 inched deep and about 15" across.  Tell your moms now so they can be looking out.

Have you done Quizlet before? It's very helpful. I created a vocab list to help you study.
Vocabulary review for chapter 24:  http://quizlet.com/76117753/chemical-reactionschapter-24-flash-cards/  try out the different activities on the Header
[Study Flashcards  Learn  Speller Test Play Scatter  Space Race]

Review Chapter 24 and your science journal notes/handouts.
Go over the Study Guide, page 760-761.
Do the Assessment at the end of chapter 24 (page 762-763.

Turn in the Chemical Reactions Lab (16 reactions) on Thursday.

Thank you for your attentiveness in class today; it encourages me more than you can know.      COMBUSTION!
 
 
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Some of you left your homework sheet in class:  https://drive.google.com/file/d/0B07s3-bcUr7tVVdkYndiTmNhZ1E/view?usp=sharing  There are notes and SOME PRACTICE PROBLEMS TO DO ON THE BACK PAGE.   We will have a quiz on Monday.  Also, turn in your chemical reactions lab on Monday, and make sure that it is neatly done in ink, according to the directions given in class and in previous blogs.

Worksheet to complete: Balancing Combustion Reactions

Quiz will be on identifying the five types of chemical reactions and on the vocabulary from chapter 24, and  balancing equations.

Poke around the internet for a chemical reaction demonstration to do.  No thermite, but I can order stuff for you from hometrainingtools.com or I might have it in my supply closet.  The theme of our "show" will be Chemistry Magic, so pick something with a little dazzle, but still safe.  I also have some books with demonstrations/experiments that you can do with household items.  We will do this with an audience of moms/dad and siblings.

1. Re-read Chapter 24, sections  3 & 4: take notes
2.  If you have not done the worksheets from previous blogs, do so now:

• http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet4.pdf
• http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet5.pdf
• (see previous blog for note about "activity series"

3.  To turn in: Write up the set of experiments we did in class in the manner I explained\

• Lab#: description or title
• Observations
• Balanced equation
• If we skipped the lab, omit the observations but do the balanced equation.
• DUE MONDAY, March 23  and it must be legible and written in PEN or typed.  NO MECHANICAL PENCILS - but do it now so that you can ask questions on Thursday.

interesting interim

The homework due Monday is the stuff from last blog posting, so scroll down to make sure you have done it all, basically the experiment (writing the equations), the video, and the two worksheets.  Monday will be more experiments - single and double displacements (also called replacements).

But here is an interesting article, on the nature side of things from the blog of a remarkable photographer:  http://thesmallermajority.com/2015/03/12/mozambique-diary-red-headed-flies/

I plan to skip science class this Thursday and just have a long art class.  Please come to art prepared with photos and ideas.  Just this once, we will start class at 9:30.

This science homework is to be completed by Monday; DO NOT put it off to the weekend, please.

Finishing parts I and II from the lab... Synthesis and Decomposition experiments (1-7)
In your science journals, go back to each experiment, including the ones we did NOT do, and figure out the balanced equations for each synthesis and decomposition  reaction.  I will write the answers on the board on Thursday so you can check.

Don't lose your experiment sheets, we will do the rest of the labs next Monday/some of them, anyway.

TAKE NOTES ON VIDEO!!!

This is some extra information you might need for doing Worksheet 4.

Single Displacement Reactions:   A +  BC ->  B + AC
These reactions only happen if   metal A is more reactive than metal B.
You can tell which metal (A or B) is more reactive by either doing the experiment, or looking it up on a list called a "reactivity series".
The metals at the top are more reactive than the ones below.

For instance,  zinc will replace iron but not magnesium, because zinc is higher on the list than iron, but lower than magnesium.  Top guy wins.

• 3Zn +FeCl3  >>  Fe +3 ZnCl    this works, the zinc replaces the iron in the iron(III)chloride solution, and the iron becomes a solid metal
•  but this will not happen:  Zn + MgCl2  >NOT>  Mg + ZnCl  The zinc metal stays zinc metal.  No reaction takes place.

Understanding this is not that important at this point, but I know some of you like to be precise just so you know that some reactions are likely to happen, and some are not.

Do these worksheets:
http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet4.pdf


and http://www.sciencegeek.net/Chemistry/chempdfs/EquationsWorksheet5.pdf
[some of these reactions  also won't really happen, as you will see from the answer sheet;
don't worry about trying to predict this with the solubility table, just do the switcharoo >>

AB + CD ->  AD +  CB   and make sure your compounds are metalfirst,thennonmetal.
........................................
Hope you are enjoying the labwork, and putting it together with the worksheets, and starting to "get it."

I appreciate your feedback;  we are in the home stretch of chemistry; keep up the good work,

For more pictures of St. Basil's Cathedral, use Google image or go here:
My own google search of St. Basil's
Feel free to use any of these pictures for inspiration,
or find your own landmark.  I suggest you print out about 3 different views to assist you,
and to doodle around with it through the week.


...and back to science, good job today doing the Synthesis of copper(II)oxide.
Monday we will do more experiments, probably on Decomposition reactions.

1. Answer the questions on the experiment page from class (in your SJ) be thorough.
2.Video - take notes in your SJ

 

3. Worksheet: Decomposition Reactions print page 1 only and check your answers from page 2

Types of Chemical Reactions

Today's class did not go so well...I think we will move on...

to>>>CHEMICAL REACTIONS!!! ---the Big Five

1. synthesis (aka composition)  -- putting together
2. decomposition  -- taking apart
3. single displacement  -- a switcharoo
4. double displacement --a double -switcharoo
5. combustion  -- and kapow!

An overview in videos: yes, take notes!

This information is also in your textbook, for reference, on pages 746-749, which you should read and answer the questions in the math skills activity and in the assessment.

and here is a worksheet:

/Chemistry/chempdfs/EquationsWorksheet2.pdf

answers are on the second page

On Thursday, we will do a lab involving a synthesis reaction between copper and oxygen.  Please be on time.

And here are some interesting videos on HCl...hydrochloric acid,,,

which you will remember we mixed with zinc in class, producing hydrogen gas...

DON'T FORGET  TO COME PREPARED FOR ART ON THURSDAY

SEE LAST WEEK'S BLOG