Ethylene diamine tetra acetic acid (EDTA) is an organic acid and its structure is shown below: HOOC--H,C CH2--COOH N- CH,-CH2 НООС-Н-С CH,--COOH Each molecule of EDTA contains a total of four acidic protons. Each -COOH functional group in EDTA is capable of reacting with one equivalent of base. Suppose a solution was prepared by dissolving 0.5000 g of EDTA in 2.50 L of water. Molecular weight of EDTA = 292.1300 g/mol You may assume the density of the solution to be 1.000 g/mL. al Calculate the molarity of the EDTA solution described above. b) What is the normality of the EDTA solution? C) What is the w/v% of the EDTA solution? d) Express the concentration in (a) above in ppm. 2 7
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
Calculate Molarity, Normality, ppm, w/v%
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