A student 發問於 科學及數學化學 · 1 十年前

# Strong/weak of acid/bases

Strong acid = donate H+

Weak acid = refuses to donate H+

Strong base = accept H+

Weak base = refuses to accept H+

Therefore, how do weak acid and weak base damage things? acid will damage base; base will damage acid. How does it work if they ( weak acid and base ) damage eachother??

In this formular: eg of weak base: NH3 + H2O ---- NH3+ + OH-

Where did the another H+ went to?

### 2 個解答

• 1 十年前
最愛解答

strong acid donates H+, and weak acid doesn&#39;t refuse to donate H+, weak acid also donates H+. no matter strong acid or weak acid, when a substance in solution produces hydrogen ions, H+, it&#39;s called acid.

the difference between strong acid and weak acid is:

when an acid dissolved in water, and all of its molecules are ionised competely, it called strong acid; if an acid dissolved in water and only some of its molecules are ionised, it called weak acid.

eg of strong acid: HCl ---&gt; H+ + Cl- (ionised competely)

eg of weak acid: CH3COOH ----&gt; H+ + CH3COO- (ionised partially)

a base combines with the hydrongen ion of an acid, but without producing hydrogen gas.

when a base dissolved in water, all of its molecules are ionised competely, it is strong base; for weak base, only some of its molecules are ionised.

eg of strong base: NaOH ---&gt; Na+ + OH-

eg of weak base: NH3 + H2O ----&gt; NH3+ + OH-

when an acid mix/reacts with a base, we don&#39;t call it&#39;s damaged, people called neutralisation. Neutralisation is: the H+ of an acid is removed by a base.

the neutralisation reaction is: OH- + H+ ----&gt; H2O

eg of (full reaction) neutralisation: HCl + NaOH ----&gt; NaCl + H2O

• 1 十年前

NH3 + H2O ----&gt; NH4+ + OH-