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Saturday, October 11, 2014

Friday, October 10, 2014

Acid and base information

Acidic,Basic and Neutral Substances


Acidic substances
Materials that contain an acid in them are called acidic substances.
Acids are of 2 types-
•Mineral Acid
•Organic Acid
Mineral Acid
A mineral acid is an acid derived from on or more inorganic compounds.They are not Organic.
Examples are-Sulphuric Acid,Nitric Acid.


Organic Acid
They occur naturally in animal and plant materials
Ex: Tartaric Acid from Grapes,Lactic acid from milk.


Characteristics of Acidic Substances are-
•They have a sour taste and are corrosive
•They are soluble in water
Acids can also be either dilute or concentrated.
Acids with more amount of water are called dilute acids.Acids with less amount of water are called concentrated acids.
Acids can also be either strong or weak.
Strong acids are highly corrosive and can cause burns.Ex:Nitric,Sulphuric Acid
Weak acids are not so destructive.


Basic Substances
Substances that contain a base are called basic substances.
Examples are Sodium Hydroxide,Calcium Hydroxide


Bases have many properties-
•They are bitter to taste
•Solutions of bases have a soapy touch
•They may or may not be soluble in water.
Bases that are soluble in water are called Alkalis.
Ex:Potassium Hydroxide,Sodium Hydroxide.


Bases can also be strong or weak
Strong bases are corrosive and can burn skin
Examples:Sodium Hydroxide


Examples of weak bases are Copper Hydroxide,Zinc Hydroxide


Neutral Substances
Some substances are neither Acidic nor Basic.These are called Neutral Substance.
When an acid reacts with a base,Neutralization reaction takes place and a Neutral Salt is formed.Here is an example of a neutralization reaction.

In this reaction Hydrochloric Acid reacts with Sodium Hydroxide to from Sodium Chloride(Common Salt) and Water.

Titration of formula


Titration Formula



A titration can determine the volume of one solution required to react exactly with a known volume of another solution. Titration frequently involve the reaction other than acid-base reactions, such as redox reactions and reactions involving precipitations.
"A titration can determine the volume of one solution required to react exactly with a known volume of another solution."
The equation for Titration Formula is expressed as
Titration Formula
Where
•N = normality of titrant
•V = volume of titrant
•Eq.wt = equivalent weight of acid
•W = mass of sample
•1000 = factor relating mg to grams
However in common the Titration Formula is written as
Titration Formula
Where
•N = normality of titrant
•V1 = volume of titrant
•Eq.wt = equivalent weight of predominant acid
•V2 = volume of sample

Tuesday, October 7, 2014

GLUCOSE


What  is glucose? What its formula?
 Glucose is something which is very sweet and gives us instant energy.Its just like the process of photosynthesis.Glucose and sugar have a big difference.Glucos
e is hydrated and more sweeter than sugar.It gives us instant energy cause it contains extr,a water.An example of glucose could be anything which contains sugar.Example :Glucond -d




formula for glucose is C6H12O6.
Glucose is the human bodies key source of energy because it is required for respiration. Through digestion, glucose is broken down into components the body can use to generate ATP from glycolysis and the citric acid cycle. ATP is the molecular unit of currency for a cell.
 

Challenging Questions



Question 1
Balance the following equation:
__ KOH + __ H3PO4 → __ K3PO4 + __ H2O
Question 2
Balance the following equation:
__ KNO3 + __ H2CO3 → __ K2CO3 + __ HNO3
Question 3
Balance the following equation:
__ Na3PO4 + __ HCl → __ NaCl + __ H3PO4
Question 4
Balance the following equation:
__ TiCl4 + __ H2O + __ TiO2 + __ HCl
Question 5
Balance the following equation:
__ C2H6O + __ O2 → __ CO2 + __ H2O
Question 6
Balance the following equation:
__ Fe + __ HC2H3O2 → __ Fe(C2H3O2)3 + __ H2
Question 7
Balance the following equation:
__ NH3 + __ O2 → __ NO + __ H2O

Question 8Question 9
Balance the following equation:
__ B2Br6 + __ HNO3 → __ B(NO3)3 + __ HBr
Balance the following equation:
__ NH4OH + __ Kal(SO4)2·12H2O → __ Al(OH)3 + __ (NH4)2SO4 + __ KOH + __ H2O

Answers
1. 1 SnO2 + 2 H2 → 1 Sn + 2 H2O
2. 3 KOH + 1 H3PO4 → 1 K3PO4 + 3 H2O
3. 2 KNO3 + 1 H2CO3 → 1 K2CO3 + 2 HNO3
4. 1 Na3PO4 + 3 HCl → 3 NaCl + 1 H3PO4
5. 1 TiCl4 + 2 H2O + 1 TiO2 + 4 HCl
6. 1 C2H6O + 3 O2 → 2 CO2 + 3 H2O
7. 2 Fe + 6 HC2H3O2 → 2 Fe(C2H3O2)3 + 3 H2
8. 4 NH3 + 5 O2 → 4 NO + 6 H2O
9. 1 B2Br6 + 6 HNO3 → 2 B(NO3)3 + 6 HBr
10. 4 NH4OH + 1 Kal(SO4)2·12H2O → 1 Al(OH)3 + 2 (NH4)2SO4 + 1 KOH + 12 H2O

Information for chemistry students

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