4A Post- + Pre-Lab Answer Keys

4A Post- + Pre-Lab Answer Keys - ANSWER KEY: EXPERIMENT #4a...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 ANSWER KEY: EXPERIMENT #4a - Synthesis of Iron Oxalate PRE-LAB QUESTIONS: 1. (1 point) The balanced equation: 1 Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 O + 1 H 2 C 2 O 4 1 FeC 2 O 4 + 2 NH 4 + + 2 SO 4 2- + 2 H + + 6 H 2 O On both sides of this reaction, Iron is in the Fe 2+ oxidation state, so this is not a redox reaction. 2. (1 point) 0.00293 mol 3. (1 point) 0.0060 mol 4. (1 point) Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 O is the limiting reagent . This is also the limiting reagent for the overall reaction in Experiment #4a . 5. (1 point) 0.422 g of FeC 2 O 4 (s) product 6. (1 point) In order to crystallize (or recrystallize) a product, the solvent system in which the product is dissolved needs to become much "poorer". In other words, a solvent in which the product has a poor solubility needs to be added to the solution. Crystallization of the product in solid form will result. Potassium (K + ) salts are much more soluble in polar solvents, such as water, than in less polar solvents, such as ethanol. Thus, adding ethanol in Step 5 will result in the crystallization of the
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

4A Post- + Pre-Lab Answer Keys - ANSWER KEY: EXPERIMENT #4a...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online