How to find LOG on a scientific calculator

  

How to find LOG on a scientific calculator 

In my previous post I taught you how to use PH log and i think that it is quite important to know where it is on the calculator and how to find the button as someone like me whose first time using it was very confusing! But alas I got there:)

The opposite of log( is -10^-x  X is the number that will always have a minus next to it, so don't forget to put the minus sign on it! it will also most likely have a decimal point in it too!

1.     pH=-log[H+]

2.     pOH=-log [OH-]3.     pH + pOH=144.     [H+]=2nd log (-pH)5.     [OH-]= 2nd log (-pOH)6.     [H+] x [OH-]=1X10-14

Log is a function on the calculator and stands for logarithm!

log on the scientific calculator looks like this:

**REMEMBER TO STAY POSITIVE LIKE A PROTON!!**

Acid-Bases and PH

Acid-Bases and PH

When a base is dissolved in water  it is called alkali.

A salt is made when a acid reacts with a base.

PH decreases when H+ ions increases.

We can measure how many H+ in a solution so its pH. PH is defined as the negative logarithm in base 10 in the H+ ion concentration express in moles per litre M.

PH=-log[H+]

As the PH goes down the number of H+ increases and the solution is more acidic. a change in one PH unit equates to a tenfold increase in H+.

**REMEMBER TO STAY POSITIVE LIKE A PROTON!!**

Naming Hydrocarbons

Naming Hydrocarbons 

Hydrocarbons are compounds containing carbon and hydrogen only and Homocylic compounds with alternative double bonds are called aromatic compounds.

Homocylic compounds without double bonds are cycloalkanes or alicylic or polymethene compounds.

A functional group is a atom or group of atoms in a molecule which gives rise to characteristic chemical behavior.

The most common alkane names:

1-Methane

2-Ethane

3-Propane

4-Butane

5-Pentane

6-Hexane

7-Heptane

8-Octane

9-Nonane

The steps to naming branched hydrocarbons.

1-Identify the root: Longest possible hydrocarbons

2-Number the carbon atoms in the root, starting at the end that is closest to an attached substituent

3-Name the root and its prefix add substituent's position and name.

**REMEMBER TO STAY POSITIVE LIKE A PROTON!!**

Amino Acid Structure

Amino Acid Structure

All proteins are made up of amino acids chains called a polypeptide. Amino acids contain a central carbon atom and a amine group and a carboxyl group and a hydrogen atom. The difference in  R group is what makes one amino acid different from another. There are 20 common amino acids present in the body.

**REMEBER TO STAY POSTIVE LIKE A PROTON!!**