Chemistry Concepts: Solutions, Reactions, and Elements
What is mole fraction?
Mole fraction represents the number of molecules of a particular component in a mixture divided by the total number of moles in the given mixture. It’s a way of expressing the concentration of a solution.
Define formality and provide its formula.
“Formality is defined as the number of gram formula mass of solute dissolved per liter of solution.” It is used for ionic compounds. The formality of the solution is denoted by the symbol F. It is similar to normality.
What is the
Read MoreComprehensive Guide to Pharmaceutical Drugs and Analytical Chemistry
Diuretics
Drugs promoting urine output are known as diuretic drugs, which refer only to those agents that act directly on the kidneys. These drugs primarily increase the excretion of water and ions like sodium (Na+), chloride (Cl-, or bicarbonates HCO3-) from the body. Glomerular filtration, tubular reabsorption, and tubular secretion in kidneys determine the excretion of substances. They are employed in the treatment of various disorders like diabetes insipidus, nephrotic syndrome, hypertension,
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Anti-infective agents are drugs that are used to treat or prevent infection.
Analgesics are medications that relieve pain.
Haematinics disease is caused by iron deficiency
EDTA– Ethylene diamine tetra acetic acid
Limit test is used to detect impurity.
Bleaching powder is used as oxidizing agent in chemical industries.
Acidifying agents are inorganic chemicals that either produce or become acid.
An error may be defined as the difference between measured and actual values.
Chemical name of alum is Aluminium
Read MoreMolar Mass Determination of a Non-Volatile Solute Using Raoult’s Law
Stage 3
Solution :
Given values
Concentration is given in percent so that take
mass of the solution = 100 g
mass of non-volatile solute = 2% = 2g
mass of the solvent = (100 — 2) = 98 g
molecular mass of solvent (water) = 18
We have to find molecular mass of solute
The vapour pressure of pure boiling water = 1atm = 1.013 bar.
Chemical Reactions: Concentration Effects & Enthalpy Changes
Aim: To study the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid. Theory: Law of mass action states that rate of a chemical reaction is directly proportional to the product of active masses (molar concentrations) of reactants. The rate of reaction between sodium thiosulphate and hydrochloric acid depends on the concentration of reactants. As the concentration of reactants increases, the rate of reaction also increases. The balanced chemical reaction
Read MoreIntroduction to Chemical Reactions
Chemical Safety
Chemical reaction: a process in which atoms of one or more substances are rearranged to form different substances.
- Chemical reactions break food down into nutrients that the body can use.
- Chemical compounds are in our everyday life, from the plastics we use to the synthetic fibres that we wear and the healthcare products we put on ourselves.
- Chemicals used at school and in the workplace can be potentially harmful.
- WHMIS (Workplace Hazardous Materials Information System) labels provide