Active chlorine (CI)” is used both in water treatment and for cleaning. If it is in the water for babies; the added hypochlorite solution has a mass concentration of 0.4 mg/L; in solutions for cleaning vegetables, the concentration is 4 mg/L; for cleaning utensils is 8 mg/L and as a cleaning product, known as semitary water, the concentration is between 25 and 50 gL” Active chlorine (Ch. PM. 71.0 g/mol) can be determined through the following reactions below: A bleach sample (d = 1.04 g/mL) was prepared by diluting 25.0 mL of the sample into a 100 mL flask. The volume was completed with distilled water, 10.0 mL was pipetted, excess KI solution in acidic medium and titrated with S,0;” 0.158 mol/L. The average volume for three replicates was 16.2 mL. Based on these data answer: a) What is the average concentration of Cl2 (% m/m) for a sample of bleach? b) What is the volume of this sample that must be added to distilled water to prepare 50 liters of a vegetable cleaning solution?
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.
“Active chlorine (CI)” is used both in water treatment and for cleaning. If it is in the water for babies; the added hypochlorite solution has a mass concentration of 0.4 mg/L; in solutions for cleaning vegetables, the concentration is 4 mg/L; for cleaning utensils is 8 mg/L and as a cleaning product, known as semitary water, the concentration is between 25 and 50 gL”
Active chlorine (Ch. PM. 71.0 g/mol) can be determined through the following reactions below:
A bleach sample (d = 1.04 g/mL) was prepared by diluting 25.0 mL of the sample into a 100 mL flask. The volume was completed with distilled water, 10.0 mL was pipetted,
excess KI solution in acidic medium and titrated with S,0;” 0.158 mol/L. The average volume for three replicates was 16.2 mL. Based on these data answer:
a) What is the average concentration of Cl2 (% m/m) for a sample of bleach?
b) What is the volume of this sample that must be added to distilled water to prepare 50 liters of a vegetable cleaning solution?
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