Question

How many Owlons are there in a 250 mL besker of OSM Cam? (10 pts) recall stoichiometry 20 2 Write the balanced molecular equation, the complete lonic equation and net lonic equation for the react Mg(OH). (milk of magnesia) with hydrochloric acid. What type of reaction is this? (20 pts) and net lonic equation for the reaction of

Answer 1

given
volume of Ca(OH)2 = 250 ml = 0.25 l
molarity = 0.5 M
moles of Ca(OH)2 present = volume *molarity = 0.25 L*0.5 M
=0.125 mols
In water Ca(OH)2 will ionize completely
Ca(OH)2 --> Ca2+ +2OH-
1 mole salt give 2 mole OH- ions
So 0.125 mol Ca(OH)2 produce 2*0.125 mole OH-
=0.25 mols OH-

1 mole OH- contain avogadro number of ions
hence
0.25 mol OH- contain = 0.25 x6.022 x10^23 OH- ions = 1.5055 x10^23 OH- ions

Answer :: 1.5055 x10^23 OH- ions
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balance molecular equation:
Mg(OH)2 (aq) + 2HCL (aq) --> MgCl2(aq) + 2H2O(l)

complete ionic equation::
Mg2+ (aq) + 2OH-(aq) + 2H+(aq) +2Cl-(aq) -->Mg2+ (aq) +2Cl-(aq) +2H2O(l)

there are common ions present[spectator ions]= Mg2+ and Cl- , cancel them to get

Net ionic equation

2H+(aq) +2OH-aq) --> 2H2O(l)

It is an acid-base reaction [neutralization reaction]
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both solved kindly upvote