Exam

The exam was tricky but I was able to finish. I study extreamly hard and hopefully it payed off. I was stuck on a few problems. I think overall i did well and i guess we will see when the grades come out!

Copper Lab

We created copper with a nail and some acid. Our baby jar contained the nail and after the nail set you started seeing the copper form this picture shows the beginning stages of the copper forming!

Redox Reactions

Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid-base reactions. Fundamentally, redox reactions are a family of reactions that are concerned with the transfer of electrons between species. Like acid-base reactions, redox reactions are a matched set -- you don't have an oxidation reaction without a reduction reaction happening at the same time. Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. Each reaction by itself is called a "half-reaction", simply because we need two half-reactions to form a whole reactions. Here a video to explain more!

Clues that a Chemical Reaction has Occuured

It may be hard to recognize that a chemical reaction has occurred but there are some indicators that tell you for sure. Some reactions produce a distinct smell or odor that may indicate when a reaction is occurring. an example my be if you go outdoors after a thunderstorm, you may detect an unusual odor in the air. The odor is an indication that lightning has caused a chemical change in the air.A change in temperature may also indicate a chemical reaction such as the temperature is higher near logs burning in a campfire. A change in color is often an indication of a chemical change. For example, fruit may change color when it ripens. Formation of bubbles as shows a reaction has taken place. The formation of gas bubbles is another indicator that a chemical change may have occurred.
Formation of a solid or precipitate shows a chemical reaction has taken place When two liquids are combined, a solid called a precipitate can form. The shells of animals such as clams and mussels are precipitates. They are the result of a chemical change involving substances in seawater combining
with substances from the creatures.

Double Replacement Reactions

A double displacement reaction, also known as a double replacement reaction or metathesis, is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products. Learning these is quite simply if you understand and follow your solubility rules and exceptions.

Chemical Reactions

I was a bit nervous about starting this unit because I figured it would be the hardest so far, but it really isn't all that bad. Most of it is math based rather than rule based so its easy to pick up on. I'm hoping for a good exam grade.  All I need to do to ensure a good grade is to remember the poly-atomic ions that have made a reoccurring appearance in the new lessons.

Solubility Rules

A basic knowledge of which compounds are soluble in aqueous solutions is essential for predicting whether a given reaction might involve formation of a precipitate (aka a solid). The solubility rules are essential in remembering if a compound can be dissolved in water or not. Here are the rules:


Rule 1. All compounds of Group IA elements (the alkali metals) are soluble.

Rule 2. All ammonium salts (salts of NH4+) are soluble.

Rule 3. All nitrate (NO3-), chlorate (ClO3-), perchlorate (ClO4-), and acetate (CH3COO- or C2H3O2-, sometimes abbreviated as Oac-) salts are soluble.

Rule 4. All chloride (Cl-), bromide (Br-), and iodide (I-) salts are soluble except for those of Ag+, Pb2+, and Hg22+.

Rule 5. All sulfate ( SO4=) compounds are soluble except those of Ba2+, Sr2+, Ca2+, Pb2+, Hg22+, and Hg2+, Ca2+ and Ag+ sulfates are only moderately soluble.

Rule 6. All hydroxide (OH-) compounds are insoluble except those of Group I-A (alkali metals) and Ba2+, Ca2+, and Sr2+.

Rule 7. All sulfide (S2-) compounds are insoluble except those of Groups I-A and II-A (alkali metals and alkali earths).

Rule 8. All sulfites (SO3=), carbonates (CO3=), chromates (CrO4=), and phosphates (PO43-) are insoluble except for those of NH4+ and Group I-A (alkali metals)(see rules 1 and 2).

Useful Information

Although notes in class are very helpful for my expanding my mind,  I seem to retain more by looking and reading from these helpful links! i hope you find them just as helpful as I do!

Balancing Equations
Chemtutor
CHEMystry
Practice Exams

Final Thoughts on Matter and Measurement

Although I did not perform well on my test I understand the ideas and concepts of the chapter. I will review the book and my notes to make sure I understand completely so I'm fully prepared for the semester final. I hope since I have improved my study habits, my test scores will be better.

The Little Molemaid

As a project for Mole day we were given the task of creating a unique and themed mole. I've been a fan of the Disney movie The Little Mermaid forever and I got to thinking that a "molemaid" would be a perfect idea. I used fabric that had Ariel on it and made sure you could tell what I was trying to compare it too.

Final thoughts on Star Log Project

The Star project was extremely fascinating because i was learning so many interesting new facts about polar bodies and what composed them. Without this project i would have never had known the amount of stars there are. Choosing my 15 stars took a while because i wanted to have a different mix of colors and a variety of different categories.The most interesting fact I learned was that the different chemicals of a star determine its color.

Half Life's

A half life is the amount of time it takes for a sample to devolve. The amount of time it takes to devolve varies depending on the element. Alpha, beta, and gamma particles explain how an element devolves. We continued to work on examples with our partners to ensure we fully understand how and what a half life is.

.

Dalton's Atomic Theory

John Dalton a chemist that created a theory containing the basics of atoms that include ideas such as;

1) All matter is made of atoms. Atoms are indivisible and indestructible.

2) All atoms of a given element are identical in mass and properties

3) Compounds are formed by a combination of two or more different kinds of atoms.

4) A chemical reaction is a rearrangement of atoms.

Others have expanded on his theory which is what makes up the practices of chemistry in the modern era.

Final thoughts on Nomenclature Unit

Learning and understanding the basics about elements and poly atomic ions will help when we dive further into chemistry. To start the year off with lessons about nomenclature will help me comprehend future chapters. I'm relieved that I've finally learned how to study for tests and quizzes.

Introduction Page

Hey ya'll, I'm Payton and I'm also a Pre-AP Chemistry student. Recently we've been assigned a project that requires us to explore plants in the area and tell whether they have medicinal qualities. this blog will have multiple plants and there chemical makeup that aid in fixing wounds, infections, and other common injuries.

A little bit about me: I enjoy engineering, southern brands and I love to run. I have future goals that include going to the university of Arkansas and becoming an engineer at Disney.

I hope all the information found in this blog is helpful

XOXO
Payton