Random chem question (1 Viewer)

[kloudsurfer]

Hey,
Would someone be able to help me with these? I am totally confused.

Q. Write balanced chemical equations to show what happens to the following substances when dissolved in water.
a) Sodium carbonate
b) sodium chloride
c) copper sulfate
d) hydrogen chloride gas
e) glucose (C6H12O6)
f) iodine

I understand solubility and why the different types of substances (ionic, polar covalent etc) are soluble and all, I just dont know how to write the equations. Am i supposed to write ionic equations for the ionic compounds?

Also
Q. In some equations, water is shown as a reactant, while in others it is ommited from the equation. Justify this observation.

Im assuming I has something to do with whether the substance is ionic or molecular and the type of and strenght of the forces determine solubility etc but since I havent done the other question im not really sure.

I would ask my teacher but he is doesnt explain things very well and we ussually end up even more confused. Thanks

 

[drynxz]

Hey,
Would someone be able to help me with these? I am totally confused.

Q. Write balanced chemical equations to show what happens to the following substances when dissolved in water.
a) Sodium carbonate
b) sodium chloride
c) copper sulfate
d) hydrogen chloride gas
e) glucose (C6H12O6)
f) iodine

I understand solubility and why the substances are soluble and how dissolution occurs and all, I just dont know how to write the equations. Am i supposed to write ionic equations for the ionic compounds?

Also
Q. In some equations, water is shown as a reactant, while in others it is ommited from the equation. Justify this observation.

Im assuming I has something to do with whether the substance is ionic or molecular and the type of forces that cause dissolution etc but since I havent done the other question im not really sure.

I would ask my teacher but he is doesnt explain things very well and we ussually end up even more confused. Thanks

Dissollution occurs because each of the molecules are polar, which means they are slightly positive of negative at one end. Water is a substance which is resposible for reducing the electro attraction force between atoms by a great amount and hence they are able to break up when placed in water.

ill just do the first one sodium carbonate
Na₂CO₃ <---H20---> Na⁺(aq) + CO₃ ^2-(aq)

 

[kloudsurfer]

Dissollution occurs because each of the molecules are polar, which means they are slightly positive of negative at one end. Water is a substance which is resposible for reducing the electro attraction force between atoms by a great amount and hence they are able to break up when placed in water.

ill just do the first one sodium carbonate
Na₂CO₃ <---H20---> Na⁺(aq) + CO₃ ^2-(aq)

Ahhh thats what I thought. Thanks.

I guess that works for the first four as they are all ionic compounds. Im assuming those are the ones that have water ommited from the reactant because they are ionic...
But what about the ones that arent ionic like iodine? Isnt its (partial) solublubility because of dispertion interactions? How would you write an equation for that? And glucose? Its solublility is due to the formation of hydrogen bonds so how is that written?