Chemistry of Water

by raj.b on August 25, 2016 · 0 comments

in Chemistry

Water is by far the most common liquid on the Earth’s surface, and its unique properties enable life to exist. For chemists, water is a small, simple looking and common molecule H2O but they also know it has many unusual and even unique properties. Scientist in many other disciplines have their own viewpoints about water […]

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Lab Safety

by Vijaya on August 21, 2016 · 0 comments

in Chemistry

A summary of rules everybody should be aware in chemistry lab. Dress appropriately for the lab – wear safety goggles and a lab apron or coat. Tie back long hair. Know what safety equipment is available and how to use it – This includes the eyewash fountain, fire blanket, fire extinguisher and emergency shower. Know […]

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Stoichiometry is the measure of relative proportions in which elements form compounds or in which substances react. The word stoichiometry derives from two Greek words “stoicheion” (meaning element) and “metron” (meaning measure). It is the name given to the quantitative relationships between the compounds in a chemical reaction. It illustrates the calculations and the fundamental […]

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Hemoglobin has a much higher affinity for carbon monoxide than for oxygen. Carbon monoxide and oxygen complete for the same binding sites on hemoglobin but the affinity of hemoglobin for carbon monoxide is 240 times that between hemoglobin and oxygen. Carbon monoxide (CO) combines with hemoglobin at the same point on the hemoglobin molecule as […]

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Is Milk a Homogeneous or Heterogeneous Mixture?

August 4, 2016

Mixtures can be either homogeneous or heterogeneous and it can be of several types. In milk it is difficult to see the different components with the naked eye. However, under a microscope you can see that milk is made up of small globules of fat, tiny lumps of protein and a clear liquid. Mixtures that […]

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What does Valence Electron mean?

August 1, 2016

Electrons do not exist as atoms except for the rare gas elements. Rather they form molecules or multi atomic compounds which may be molecules, crystals or glassy compounds. As atoms approach one another, the interaction between these are concerned with those electrons in the outermost orbitals. An electron in the outermost orbital is called a […]

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How did Arrhenius describe Acids and Bases?

July 27, 2016

Acids and bases are common in all areas of human endeavor. Acids and bases were some of the first chemicals to be manufactured and studied in detail by alchemists. Acids and bases are also essential to the proper biochemical functioning of living organisms. Svante Arrhenius considered an acid to be any substance that increases the […]

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How to Calculate Normality?

July 24, 2016

Normality(N) is a concentration unit used in the equivalent weight system. The normality of a solution is defined as the number of equivalents of a solute(X), dissolved in 1 liter of solution. Normality of X = Nx = equivalents of X / liters of solution V The conventional concentration unit is Molarity (M). We can […]

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F-Block Elements of the Periodic Table

July 18, 2016

Elements in which the last electron enters any one of the seven f-orbitals of their respective ante-penultimate shells are called f-block elements. There are two series of f-block elements each containing 14 elements. These are placed at the bottom of the periodic table. The elements of f-block are also called inner transition elements. F-block elements […]

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How to Detect Current Flow by Amperometric Techniques

July 14, 2016

Amperometry is an electroanalytical technique based upon the measurement of the current flowing through the working electrode of an electrochemical cell. Moreover, amperometry encompasses coulometry, voltammetry and constant potential techniques and is widely used to identify and quatify electroactive species in the liquid or gas phase. Amperometric techniques establish conditions which will yield an electrolysis […]

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