ACID AND BASES

HEY EVERYONE!

PROPERTIES OF ACIDS
Corrosive ('burns' your skin)
Sour taste (e.g. lemons, vinegar)
Contains hydrogen ions (H+) when dissolved in water
Has a pH less than 7
Turns blue litmus paper to a red colour
Reacts with bases to form salt and water
Reacts with metals to form hydrogen gas
Reacts with carbonates to form carbon dioxide, water and a salt
EXAMPLES OF ACIDS
Hydrochloric acid (HCl) in gastric juice
Sulphuric acid (H2SO4)
Nitric acid (HNO3)
Carbonic acid in softdrink (H2CO3)
Uric acid in urine
Ascorbic acid (Vitamin C) in fruit
Citric acid in oranges and lemons
Acetic acid in vinegar
Tannic acid (in tea and wine)
Tartaric acid (in grapes)
PROPERTIES OF BASES
Corrosive ('burns' your skin)
Soapy feel
Has a pH more than 7
Turns red litmus paper to a blue colour
Many alkalis (soluble bases) contain hydroxyl ions (OH-)
Reacts with acids to form salt and water
EXAMPLES OF BASES
Sodium hydroxide (NaOH) or caustic soda
Calcium hydroxide ( Ca(OH)2 ) or limewater
Ammonium hydroxide (NH4OH) or ammonia water
Magnesium hydroxide ( Mg(OH)2 ) or milk of magnesia
Many bleaches, soaps, toothpastes and cleaning agents

Acid and Base Assignment of Titration

hey everyone,

in today's class we Mrs.K went over the assignment that she handed yesterday and after we finished correcting this assignment. Mrs.K handed out study guide for Acid and Bases,which means that we have test on Monday if we make it. for those of us who want to get (A+) you have to study every hard my friend. I am  sorry if I didn't blog enough information to the blog, because I forgot my binder.Good luck everybody.

                     next scribber is Yonas.

Patterns in Electron Configuration

Today's class

Ms.K hand out some worksheet today's class. one of them was pattern in electron configuration. One of the many patterns contained in the periodic table is that of electron configuration. In this activity, you will identify these patterns. Later, you will use these patterns to determine the order in which electrons fill the orbitals of an atom.

Valence electrons

Valence electrons are electrons that are in the highest principal energy level of an atom. Each of the group 1A elements has one electron in its highest energy level; each elements has one valence electron.This is no coincidence. The group 1A elements have similar chemical properties because they all have the same number of valence electron configuration of s1. Like wise, each group 2A elements has a valence electron configuration of s2. Tomorrow's scribe is Yonas