Why is HC3HO considered a weak acid?
Why is NaOH considered a strong base?
Why is Mg(NO3)2 considered a salt?
Since this is not my area of expertise, I searched Google under the key words "acid base salt" to get this:
http://www.google.com/search?client=safari&rls=en&q=acid+base+salts&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
HC3HO is considered a weak acid because it does not dissociate completely in solution. In other words, it won't give up all of its H+ ions in the solution.
NaOH is considered a strong base because it completely dissociates in solution. In other words, it'll break down into its Na+ and OH- ion components in solution.
Mg(NO3)2 is considered a salt because it consists of the cation of a base and the anion of an acid from a neutralization (acid-base) reaction.
To understand why HC3HO is considered a weak acid, we need to examine its behavior when dissolved in water. A weak acid is one that only partially dissociates in water, meaning it does not release all of its hydrogen ions (H+) as easily as a strong acid would.
In the case of HC3HO (also known as acetic acid or vinegar), when it is dissolved in water, only a small portion of the HC3HO molecules will dissociate into H+ ions and C3HO- ions. The majority of HC3HO molecules remain intact. This partial dissociation results in a lower concentration of H+ ions in the solution, hence acting as a weak acid.
Now, let's talk about why NaOH is considered a strong base. A strong base is one that fully dissociates in water, releasing all of its hydroxide ions (OH-) readily. When NaOH, known as sodium hydroxide, is dissolved in water, it completely dissociates into Na+ ions and OH- ions. As a result, the concentration of OH- ions in the solution is relatively high, making it a strong base.
Finally, regarding Mg(NO3)2 being considered a salt, we need to understand what a salt is in chemistry. A salt is formed when an acid and a base react with each other to produce a neutral compound. In the case of Mg(NO3)2, it is made up of magnesium ions (Mg2+) and nitrate ions (NO3-).
Mg(NO3)2 is formed when magnesium oxide (MgO), a base, reacts with nitric acid (HNO3), an acid. The oxide ion (O2-) from the base combines with the hydrogen ion (H+) from the acid to form water (H2O), while the magnesium ion (Mg2+) combines with the nitrate ion (NO3-) to form Mg(NO3)2. Therefore, Mg(NO3)2 is considered a salt.