In the previous post, we discussed the titration of 25.0 mL of 0.100 M strong acid HCl with 0.100 M NaOH. Today, we will focus on the titration of a weak acid with strong bases, so we can still use … Read more
Earlier in the semester, or perhaps in your Chem II class, you learned about acid-base titrations which were used to determine the concentration of an acid or a base. For this, we are using a standard solution (titrant) which is … Read more
In this set of practice problems, we will work on examples correlating the acidity and basicity of a solution with pH, calculating the pH of strong and weak acids and bases, the pH and pOH relationship, and calculating the pH … Read more
When discussing the molar solubility and solubility product constant (Ksp), we mentioned that the values pertain to saturated solutions of the given compound. For example, the molar solubility of BaOS4 is 3.87 x 10-5 mol/L. Therefore, it starts precipitating only … Read more
In this set of practice problems, we will work on calculating the solubility product constant (Ksp) from the molar solubility of the compound, and vice versa, the Ksp of compounds in pure water, in the presence of salts with common … Read more
The solubility of almost any ionic compound is affected by the pH of a solution. The effect is more pronounced when one or both of the ions in the compound are slightly basic or acidic. For example, magnesium hydroxide, an … Read more
In the previous post, we talked about the solubility and solubility product constant (Ksp) of ionic compounds with low solubility. For example, the dissolution equation and the Ksp for CaF2 are: CaF2(s) ⇆ Ca2+(aq) + 2F–(aq) Ksp = [Ca2+][ … Read more
Ksp – The Solubility Product Constant Remember, earlier when discussing precipitation reactions, we used tables with rules for solubility to classify compounds as water-soluble or insoluble. For example, BaCl2, according to the rules, is soluble, while BaSO4 is insoluble in … Read more
In the previous two posts, we talked about the acid-base strength and their quantitative description using Ka, pKa, Kb ,and pKb. Now, sometimes, we need to do calculations which can be made easier if we find a way to link … Read more
Strong Bases The most widely used strong bases in general chemistry are the hydroxides of alkali (group 1A) metals such as KOH (caustic or just potash), NaOH (caustic soda), and LiOH. Just like the strong acids, we recognize them by … Read more
