1. A sample of an aspirin tablet weighing 78.79 g was titrated with 56.39 mL of a standardized Ba(OH)2 solution with a concentration of 0.7406. Determine the % of acetylsalicylic acid present in the aspirin sample. 2 HC9H7O4 + Ba(OH)2 --> Ba(C9H7O4)2 + 2H2O acetylsalicylic acid = 180.158g/mol
Ionic Equilibrium
Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.
Arrhenius Acid
Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.
Bronsted Lowry Base In Inorganic Chemistry
Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.
1. A sample of an aspirin tablet weighing 78.79 g was titrated with 56.39 mL of a standardized Ba(OH)2 solution with a concentration of 0.7406. Determine the % of acetylsalicylic acid present in the aspirin sample.
2 HC9H7O4 + Ba(OH)2 --> Ba(C9H7O4)2 + 2H2O
acetylsalicylic acid = 180.158g/mol
2.
An antihistamine sample, brompheniramine maleate, weighing 5.01234 g was dissolved in alcohol and decomposed with metallic sodium. The resulting solution was treated with 12.00mL of 0.3121M AgNO3 to precipitate all of the liberated bromide ions as AgBr. The excess AgNO3 remaining in the solution was titrated with 9.123mL of 0.2181M KSCN to reach the endpoint. What is the %Br in the sample?
Br- + Ag+ --> AgBr(s)
Ag+ + SCN- --> AgSCN(s)
Br = 79.904 g/mol
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