Finely powdered zinc metal is added to an acidic aqueous solution that contains…
CHEMISTRY · Multi-part · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
Finely powdered zinc metal is added to an acidic aqueous solution that contains dichromate ions. The resulting reaction produces aqueous Zn²⁺ and Cr³⁺ ions.
(a) Classify the type of chemical reaction that occurs. Provide evidence at the particulate level to support your classification.
(b) Write the balanced net ionic equation for the reaction in acidic solution. Show the conservation of both mass and charge.
(c) State the total number of electrons transferred per chromium atom in the balanced reaction and explain how you arrived at that value.
(d) If 0.250 g of zinc powder is completely consumed, calculate the mass of Cr³⁺ (in grams) produced, assuming the dichromate ion is present in excess.