Redox Test
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Showing posts with label redox. Show all posts
Showing posts with label redox. Show all posts
Thursday, March 5, 2009
Tuesday, March 3, 2009
Redox Again
Hey everybody it's night hawk here writing today's blog, the date is March 3 2009 and today we basically reviewed on how to balance Redox equations in Acidic an Basic solutions. Furthermore Ms K also assigned us page 499 questions #22 A-C in a big book as a review for our test. This basically sums up what we did today I hope everyone does a good job on the test tomorrow, well this is Night hawk signing out peace.
Monday, March 2, 2009
03/02/09
Today at the beginning of class Ms.K went over the answers for the Redox Reactions Worksheet. After that we worked on Section 20.3 Balancing Redox Equations Questions 2. a-d ;HalfrxnmethodView more presentations from ekozoriz.
Today we learned that to balance a redox reactions you need to;
1. Write the oxidation numbers
2. Split the equation into two parts; oxidation and reduction
3. Add electrons to the correct sides of the equations
4. For acidic reactions add H2O and then H+ as needed
5. For basic reactions ad H2O then H+ and then OH- as needed
6. Make electrons from both reactions the same by multiplying the whole reaction
7. Add the two reactions together
8. Check that oxidation
After we finished that Ms.K assigned us Section 20.3 Balancing Redox Equations Question 3. a-f for homework and it should be done for tomorrow.
Today we learned that to balance a redox reactions you need to;
1. Write the oxidation numbers
2. Split the equation into two parts; oxidation and reduction
3. Add electrons to the correct sides of the equations
4. For acidic reactions add H2O and then H+ as needed
5. For basic reactions ad H2O then H+ and then OH- as needed
6. Make electrons from both reactions the same by multiplying the whole reaction
7. Add the two reactions together
8. Check that oxidation
After we finished that Ms.K assigned us Section 20.3 Balancing Redox Equations Question 3. a-f for homework and it should be done for tomorrow.
Saturday, February 28, 2009
Thursday, 02.26.09
In the beginning of the class, Ms. K showed us an animation about redox. To review this animation, click here:)...
After the animation, Ms. K went over Section 20.2 of OXIDATION-REDUCTION REACTIONS worksheet that the sub gave us. If you missed the class or simply wants to see the answers again, check the slideshow below.
Ms. K then started a new lesson about BALANCING USING OXIDATION METHOD. (note. this lesson is not on the yellow booklet).
To balance using the oxidationnmethod, we have to follow these steps:
STEP 1. DETERMINE THE OXIDATION NUMBERS.
STEP 2. DETERMINE THE NUMBER OF ELECTRONS TRANSFERRED PER ATOM/ION FROM THE CHANGED IN THE OXIDATION #s.
STEP 3. DETERMINE THE # OF ELECTRONS TRANSFERRED PER MOLE FROM THE SUBSCRIPT IN THE CHEMICAL FORMULA.
STEP 4. MAKE THE # OF ELECTRONS LOSS = # OF ELECTRONS GAINED BY FINDING THE SIMPLE COEFFICIENTS TO BALANCE THE # OF ELECTRONS TRANSFERRED.
STEP 5. BALANCE THE EQUATION AS YOU NORMALLY WOULD.
To see examples for each of these steps, pls see Ms. K's slideshow below....
We then answered SECTION 20.3 , # 1 question. Ms. K went over the answers for letters A to D, and can also be found in the slide show below...
IMPORTANT
TEST will be on TUESDAY. If you missed the class, dont forget to ask Ms K for the review worksheet she gave us, STUDY GUIDE, REDOX REACTIONS.
Thats it for this day..merci:) HAVE A NICE LOONG WEEKEND ^_ _ _ _^
the next scribe is...ASHLEY:)
After the animation, Ms. K went over Section 20.2 of OXIDATION-REDUCTION REACTIONS worksheet that the sub gave us. If you missed the class or simply wants to see the answers again, check the slideshow below.
Ms. K then started a new lesson about BALANCING USING OXIDATION METHOD. (note. this lesson is not on the yellow booklet).
To balance using the oxidationnmethod, we have to follow these steps:
STEP 1. DETERMINE THE OXIDATION NUMBERS.
STEP 2. DETERMINE THE NUMBER OF ELECTRONS TRANSFERRED PER ATOM/ION FROM THE CHANGED IN THE OXIDATION #s.
STEP 3. DETERMINE THE # OF ELECTRONS TRANSFERRED PER MOLE FROM THE SUBSCRIPT IN THE CHEMICAL FORMULA.
STEP 4. MAKE THE # OF ELECTRONS LOSS = # OF ELECTRONS GAINED BY FINDING THE SIMPLE COEFFICIENTS TO BALANCE THE # OF ELECTRONS TRANSFERRED.
STEP 5. BALANCE THE EQUATION AS YOU NORMALLY WOULD.
To see examples for each of these steps, pls see Ms. K's slideshow below....
We then answered SECTION 20.3 , # 1 question. Ms. K went over the answers for letters A to D, and can also be found in the slide show below...
IMPORTANT
TEST will be on TUESDAY. If you missed the class, dont forget to ask Ms K for the review worksheet she gave us, STUDY GUIDE, REDOX REACTIONS.
Thats it for this day..merci:) HAVE A NICE LOONG WEEKEND ^_ _ _ _^
the next scribe is...ASHLEY:)
Thursday, February 26, 2009
Wednesday, February 25, 2009
Redox Continued
February 25, 2009
Finally I've joined this darned blog but yeah. Moffatt picked me to scribe today knowingly I had other stuff to do like sleep. Anyways, here's the following things we've done in class.
1. We were shown an experiment between Aluminum paper and an acid. As shown in class, the Aluminum broke down into a red-ish color from it's original silver color prior to being placed into the acid.
2. Corrected page 14 in our yellow "Grade 12 Chemistry Aqueous Reaction" booklet.
I honestly would have put the answers down but I didn't accomplish to copy them in class. Sorry about that.
3. Lastly, we were assigned Section 20.2 (1-4) on the handout sheet "Oxidation - Reduction Reactions" given out last week by Ms. Hall. ( I think )
Anyways, I have no idea who to pick to scribe for tomorrow but we'll see what comes up.
- Tony
Finally I've joined this darned blog but yeah. Moffatt picked me to scribe today knowingly I had other stuff to do like sleep. Anyways, here's the following things we've done in class.
1. We were shown an experiment between Aluminum paper and an acid. As shown in class, the Aluminum broke down into a red-ish color from it's original silver color prior to being placed into the acid.
2. Corrected page 14 in our yellow "Grade 12 Chemistry Aqueous Reaction" booklet.
I honestly would have put the answers down but I didn't accomplish to copy them in class. Sorry about that.
3. Lastly, we were assigned Section 20.2 (1-4) on the handout sheet "Oxidation - Reduction Reactions" given out last week by Ms. Hall. ( I think )
Anyways, I have no idea who to pick to scribe for tomorrow but we'll see what comes up.
- Tony
Wednesday, February 25th
At the beginning of class, Mrs. K handed our titration lab back. When doing labs, she reminded us to do what has been asked, like stating the purpose of the lab, the qualitative observations of the substances involved, and the calculations of how we got our answers.
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We also reviewed what a Redox Reaction is and the definition of an Oxidation Reaction and a Reduction Reaction.
A Redox Reaction is a reaction wherein oxidation and reduction occur at the same time.
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Next up, Ms. K showed us an experiment involving a Redox Reaction where:
The aluminum lost electrons and the copper gained electrons.
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For the remainder of the class, we worked on the questions in the booklet and the worksheet as practice for determining the oxidation number of atoms; and indicating the element reduced, the element oxidized, the oxidizing agent, and the reducing agent.
The next scribe will be MARIE :)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
We also reviewed what a Redox Reaction is and the definition of an Oxidation Reaction and a Reduction Reaction.
A Redox Reaction is a reaction wherein oxidation and reduction occur at the same time.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Next up, Ms. K showed us an experiment involving a Redox Reaction where:
- She added copper (II) chloride to a beaker of water.
- Because of that, the water turned blue-green.
- She got a piece of crumpled aluminum foil and placed it inside the beaker.
- After a few minutes, the aluminum started to have a dark orange colour and it little by little dissolved away.
The aluminum lost electrons and the copper gained electrons.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
For the remainder of the class, we worked on the questions in the booklet and the worksheet as practice for determining the oxidation number of atoms; and indicating the element reduced, the element oxidized, the oxidizing agent, and the reducing agent.
- An oxidized element increases its oxidation number because it loses electrons.
- A reduced element decreases its oxidation number because it gains electrons.
- An oxidizing agent is a chemical compound contains the atom that gains electrons in a redox reaction.
- A reducing agent is a chemical compound that contains the atom that loses electrons in a redox reaction.
The next scribe will be MARIE :)
Tuesday, February 24, 2009
Tuesday, February 24th add on
Just to add on to what MsK.s slide show, we also had to answer questions from the Aqueous Reactions Booklet, numbers 1-17 on pages 13 and 14. We also got two worksheets from Ms. Hall that we were supposed to do (even though we didn't understand her explanations) so they would be good practice. Even though I am not scribe for today i guess i will pick dangerfield for next scribe.
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