Balancing of Chemical Equations
Balancing of Chemical Equations - If the number of atoms of an element on both sides of a chemical reaction is equal, then the equation is said to be balanced . Example: Potassium nitrate decomposes on heating to form Potassium nitrite and Oxygen. Now count the number of atoms o..
Chemical Properties of Nitric Acid
Thermal stability - On heating, HNO 3 decomposes to give NO 2..
Trends in Chemical Reactivity
. The reluctance of silicon to form p p -p p bonds to itself is clearly shown by the following facts: that (i) elemental silicon exists only in tile diamond structure and no form of elemental silicon is comparable to graphite and (ii) while CO 2 is a gas with two carbon oxygen double bonds, Si..
. The reluctance of silicon to form p p -p p bonds to itself is clearly shown by the following facts: that (i) elemental silicon exists only in tile diamond structure and no form of elemental silicon is comparable to graphite and (ii) while CO 2 is a gas with two carbon oxygen double bonds, Si..Chemical Properties of Graphite
1. Graphite is inactive and inert to almost all chemicals. 2. It does not burn in air, even if heated to high temperature. But if heated in oxygen, it burns completely to form only carbon dioxide (Fig.10.3..
1. Graphite is inactive and inert to almost all chemicals. 2. It does not burn in air, even if heated to high temperature. But if heated in oxygen, it burns completely to form only carbon dioxide (Fig.10.3..Physical and Chemical Changes Summary
Summary - In a physical change the shape, size, appearance or state of a substance may alter, but it is a temporary change, which is usually reversible. There is no new substance formed, no change in the mass of the substance and no energy changes are involved. In a chemical change, new s..
Chemical Properties of Water
1. Metals such as gold, silver, copper, tin, etc. do not react with water. 2. Ordinary iron gets rusted and aluminium gets tarnished. 3. Highly electro-positive metals react vigorously with water to form their respective hydroxides and liberate hydrogen. Some of these reactions are discus..
Some Important Chemical Compounds
Sodium belongs to Group I in the periodic table. This group is otherwise known as the alkali metals group. Since the atomic number of sodium is 11, its electronic configuration is 2,8,1. Sodium easily loses the lone electron to attain the stable configuration of neon. Therefore alkali metals ..
Rules of Chemical Formula
Formula Writing and Nomenclature of Co-ordination Compounds - Rules for formula writing: 1) Formula of the cation must be written first followed by anion. 2) The Co-ordination sphere is written in square brackets. 3) Within the co-ordination sphere the sequence is (Metal atom, anionic, ne..
Chemical Properties of Metals
Chemical Properties of Metals - Metals are Electropositive Elements Metals are very reactive. Metals tend to loose electrons easily and form positively charged ions; therefore metals are called electropositive elements. Sodium metal forms sodium ions Na + , Mg forms positively charged Mag..
Chemical Properties of Metals
Metals are Electropositive Elements Metals are very reactive. Metals tend to loose electrons easily and form positively charged ions; therefore metals are called electropositive elements. Sodium metal forms sodium ions Na + , Mg forms positively charged Magnesium ions Mg 2+ and aluminium forms al..
Result
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