Two separate aqueous mixtures are prepared at 25 °C: • Mixture 1 is made by combining…
CHEMISTRY · Multi-part · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
Two separate aqueous mixtures are prepared at 25 °C:
• Mixture 1 is made by combining solutions of sodium nitrate and potassium chloride.
• Mixture 2 is made by combining solutions of lead(II) nitrate and potassium iodide.
The student is asked to analyze both systems in terms of symbolic representations of the chemical changes (or lack thereof).
(a) For Mixture 1, the student writes "no net reaction" as the net ionic equation. Describe the chemical reasoning that justifies this statement.
(b) For Mixture 2, write the balanced net ionic equation that represents the change occurring when the two solutions are mixed.
(c) Demonstrate explicitly, using the equation from part (b), how both mass and charge conservation are satisfied.
(d) Discuss why ions that remain in solution on both sides of an equation are omitted from a net ionic equation, making reference to the particulate nature of matter.