Answer to Question #108246 in General Chemistry for Araceli Grimaldo

Question

Draw a particulate level diagram for the following solutions. Include charges on dissolved ions. Each atom should be represented by a circle,(

Answer 1

I think that the condition is a bit incomplete, but here is what seems was supposed for this problem:

Question

Draw a particulate level diagram for the following solutions. Include charges on dissolved ions. Each atom should be represented by a circle,(⚫⚪⬤) , with the exception of NO₃^‒, which can be represented as one circle. Try to draw the relative size of the atoms, e.g. NaCl(s) could look like ⚪○ only the circles would be touching or very close together, and include charges because NaCl is an ionic compound. Each circle should represent 1 mole of an atom (or NO₃^‒)

1) 1.0 Liter of a 2.0 M solution of Mg(NO₃)₂(aq)

2) 0.50 L of a 2.0 M solution of Na₂S(aq)

3) 1.0 L of a 2.0 M solution of CO₂(aq)

Solution

1) 1.0 L of 2.0 M solution of Mg(NO3)2 has molarity equal to number of moles per volume in litre. The number of moles define how many atoms (ions) the solution has.

Therefore, 2 moles (2*1=2) have 2 Mg(NO₃)₂ = 2Mg²⁺ + 4NO3^-1.

2) 0.5 L of 2 M Na₂S.

Number of moles equal to molarity multiplied by the volume, i.e., 1:

1 mole of Na2S = 2Na⁺ + S^-2

3) 1.0 L of 2.0 M solution of CO₂ has 2 moles.

The diagrams are below: