How would I tell if this is an acid/base and strong/weak??

Question

C2H5NH2 + H2O <-> C2H5NH3+ + OH-

Answer 1

As you can see, the reaction is producing OH- , hydroxide ions, so we know that the substance is a base. Notice the arrows in the equation, they point BOTH ways, that tells us that the reaction is reversible. Some of the hydroxide is reforming Water. to know for sure look up the the pKb, the bases with smaller pKb is a strong base, the pKb of ethylamine is 3.19 a small pKb , so it is a base. It would be considered a weak base, but a stronger weak base. everything is relative for example urea is a weaker base with a pKb of 13.90

Answer 2

simply put, in this case, check for double arrow, which indicates weak acid/base. generally, the Ka(for acids) or Kb(for bases) would be given, telling u that its a weak acid/ base.

also, know that the smaller the Ka/ Kb value, the weaker the acid or base. Ka/Kb values measure stregth of acids/bases.

over here, this is a weak base, cos of double arrow and also cos it dissociates partially, i.e, it releases an OH minus ion when it combines with a water molecule.
eg of a strong base would be NaOH.
NaOH(aq)->Na(aq) + OH(aq). this shows full dissociation.

Answer 3

well first of all it's producing OH- which is a base so that means it is taking H from water. that makes it a base. the strength is stronger than OH- because in nature it reacts to produce weaker bases/