Recognize an acid or a base as strong or weak. Determine if a salt produces an acidic or a basic solution. Strong and Weak Acids Except for their names and formulas, so far we have treated all acids as equals, especially in a chemical reaction.
The nitrogen in C 5 H 5 N would act as a proton acceptor and therefore can be considered a base, but because it does not contain an OH compound, it cannot be considered a strong base; it is a weak base. When an ionic compound dissolves, it separates into its constituent ions:. Because Ca OH 2 is listed in Table Certain salts will also affect the acidity or basicity of aqueous solutions because some of the ions will undergo hydrolysis, just like NH 3 does to make a basic solution.
The general rule is that salts with ions that are part of strong acids or bases will not hydrolyze, while salts with ions that are part of weak acids or bases will hydrolyze.
Consider NaCl. The net result? Will it hydrolyze? Because neither ion in NaCl affects the acidity or basicity of the solution, NaCl is an example of a neutral salt An ionic compound that does not affect the acidity of its aqueous solution.
Things change, however, when we consider a salt like NaC 2 H 3 O 2. What about the acetate ion? Does this happen? Yes, it does. Because HC 2 H 3 O 2 is a weak acid. Any chance a weak acid has to form, it will the same with a weak base. Thus NaC 2 H 3 O 2 solutions are slightly basic, so such a salt is called a basic salt An ionic compound whose aqueous solution is slightly basic.
There are also salts whose aqueous solutions are slightly acidic. NH 4 Cl is an example. Recall from Section NH 4 Cl is an example of an acid salt An ionic compound whose aqueous solution is slightly acidic. When the base is added to water, such as sodium hydroxide, we had sodium hydroxide toe water. It will completely disassociate into its n A plus, and it's O. Minus the problem with two commonly known strong bases sodium hydroxide.
I'm sorry. Calcium hydroxide and magnesium hydroxide is that they are only slightly soluble. So when you add solid magnesium hydroxide, Ah, lot of it is not going to dissolve in water. But we still classify it as a strong base because the small amount that does dissolve in water completely dissociates. So if we can get it in tow water once it's in water, it reacts strongly with water and completely dissociates.
So this is often why we consider two bases, such as magnesium hydroxide and calcium hydroxide, as strong bases. Explain why the neutralization reaction of a weak acid and a strong base giv… Explain why the neutralization of a strong acid and a weak base gives a weak… Sugar Refining Strontium hydroxide is used in the refining of beet sugar.
Magnesium hydroxide and magnesium citrate function as mild laxatives when th… Why are ionizations of strong acids and strong bases generally not treated a… Problem Identify two acids and their conjugate bases in t…. View Full Video Already have an account? David C. Problem 12 Easy Difficulty Why can magnesium hydroxide be described as a strong base even though it is only slightly soluble in water?
Answer Its limited solubility suggests that some will not dissolve. View Answer. Topics Liquids. Chemistry Chapter 15 Acids and Bases.
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