Question

(8 ° < ③コReading Assignments / , × , e clogg Study × C Secure Ihtps:/blackboard uncp edu/webapps/assess Apps , imported From IE Galantis-Gold Dust S·Guid ment/take/launch jsp/course assessment id- 385736 1acourse id- 122081,18xcontent jid- 4223834 Fhuid Referen Starter Replacement Sign in My Morning lacket 1 a siter- QUESTION 5 Sodium hydroxide and magnesium nitrate react according to the molecular equation shown below. 2NaOH(aq) + Mg(NO3)2(aq) → Mg(OH)2(s) + 2NaNO3(aq) What would be the net ionic equation for this reaction? O 2Na+(aq) + 20H-(aq) → 2NaOH(aq) Mg2+(aq) + 20H-(aq) → Mg(OH)2(s) 2Mg2+(aq) + 2NO3-(aq) → Mg(NO3)2(aq) O 2Na+(aq) + 2NO3-(aq) → 2NaNO3(aq)

Answer 1

2NaOH (aq) + Mg(NO3)(aq)--> Mg(OH)2(s) + 2NaNO3(aq) 1 1 mole of NaOH contains 1 mole of Nat and 1 moles of OH. Since the balanced equation shows that 2 moles of Sodium chloride are involved in the reaction a total of 2 moles (2 x 1) of Na* and 2 moles (2 x 1) of Ch are formed. 2. 1 mole of Mg(NO3)2 contains 1 mole of Mg2+ and 2 moles of NO3. Since the balanced equation shows that 1 moles of Magnesium nitrate is involved in the reaction a total of 1 moles (1 x 1) of Mg2+ and 2 moles (1 x 2) of NO3-are formed. Since Magnesium hydroxide is an insoluble solid (indicated by the (s) beside its formula), it will not form appreciable amounts of ions in water. It is brought down unchanged into the complete ionic equation 3. 4 1 mole of NaNO3 contains 1 mole of Na and 1 moles of NO3. Since the balanced equation shows that 2 moles of Sodium nitrate are involved in the reaction a total of 2 moles (2x 1) of Na and 2 moles (2 x 1) of NOs are formed. The complete ionic equation for the reaction between sodium hydroxide and magnesium nitrate was 2Na (aq)+20H (aq) Mg2+(aq)+2NO3 (aq)Mg(OH)2(s) 2Na (aq)+2NO3 (aq) same ions in both sides are cancelled to each other. Then 2Nafaq)+2OH (aq)Mg2 (aq)+2NOsfaą) Mg(OH)2(s) 2Narfae)+2NOsfae) Then, the net ionic equation is Mg2 (aq)+ 20H (aq)Mg(OH)2(s)