Why Is Sodium Carbonate Be Very Soluble In Water
Unit 4: Solutions and Solubility
Lesson 13 Key Questions:
42. a) Cloudy pond water – Heterogenous, light cannot pass though, can see different parts.
b) Apple Juice – Solution, organic apple particles(solute), and water(solvent).
c) Rainwater – Solution, CO2, hydrogen(solute), and water(solvent).
d) 14-karat gold in jewelry – Heterogenous, light cannot pass through. Just because light can’t pass through, doesn’t mean it’s not a solution! Gold is a solid solution – it is different metals mixed together, but when you observe it, only one phase is visible.
(1 mark lost)
43. Sodium Carbonate will be very soluble in water because of the positive ions of sodium attached to the negative ions of the carbonate. Methanol will be partly soluble in water due to it’s small size and the presence of the OH group in the molecule and it’s very polar nature. Gasoline (Octane), is completely insoluble since it is non-polar. …show more content…
a) Sodium Carbonate: Na2CO3 CO2 + Na2O
b) Magnesium Chloride: 2MgCl2 Mg2 + 4Cl
c)Ammonium Hydroxide: NH4OH H2O + NH3
You did not show any ionic charges on the products. All of these compounds are ionic compounds they will simply separate into the ions, there will be no new molecules made, as you have indicated in parts and c. Lastly, for B, there was no need to add 2 as a coefficient Mg is a metal, it does not exist as a diatomic molecule.
(4 marks lost)
45. Both covalent and ionic substances allow water to surround it, and hydrate the substance. It is just that eventually the water breaks apart ionic substances, and covalent substances just continue to be hydrated without dissociating. Ok, but why does water surround the particles? How do the particles become spread out in the solution?
(2 marks
Lesson 13 Key Questions:
42. a) Cloudy pond water – Heterogenous, light cannot pass though, can see different parts.
b) Apple Juice – Solution, organic apple particles(solute), and water(solvent).
c) Rainwater – Solution, CO2, hydrogen(solute), and water(solvent).
d) 14-karat gold in jewelry – Heterogenous, light cannot pass through. Just because light can’t pass through, doesn’t mean it’s not a solution! Gold is a solid solution – it is different metals mixed together, but when you observe it, only one phase is visible.
(1 mark lost)
43. Sodium Carbonate will be very soluble in water because of the positive ions of sodium attached to the negative ions of the carbonate. Methanol will be partly soluble in water due to it’s small size and the presence of the OH group in the molecule and it’s very polar nature. Gasoline (Octane), is completely insoluble since it is non-polar. …show more content…
a) Sodium Carbonate: Na2CO3 CO2 + Na2O
b) Magnesium Chloride: 2MgCl2 Mg2 + 4Cl
c)Ammonium Hydroxide: NH4OH H2O + NH3
You did not show any ionic charges on the products. All of these compounds are ionic compounds they will simply separate into the ions, there will be no new molecules made, as you have indicated in parts and c. Lastly, for B, there was no need to add 2 as a coefficient Mg is a metal, it does not exist as a diatomic molecule.
(4 marks lost)
45. Both covalent and ionic substances allow water to surround it, and hydrate the substance. It is just that eventually the water breaks apart ionic substances, and covalent substances just continue to be hydrated without dissociating. Ok, but why does water surround the particles? How do the particles become spread out in the solution?
(2 marks