Exp%204%20grading%20-%20products%20and%20reactants%20-%20f07

Exp%204%20grading%20-%20products%20and%20reactants%20-%20f07...

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

View Full Document Right Arrow Icon
Experiment 8- Products and Reactants Name___________________________ Report Sheet KEY (20 “parts”, 12 pts total), ~1/2 pt each Partners________________________ ________________________________ For the reactions you performed in lab, describe what you observed and write a balanced chemical equation to describe the reaction. Write the color of each species in solution under that term in the chemical reaction. Investigation 1: Chromate Solution (A) A solution of potassium chromate K 2 CrO 4 2 K + + CrO 4 -2 (yellow solution due to CrO 4 -2 (aq), no ppt) (B) Sulfuric acid was added to the solution of potassium chromate H 2 SO 4 (aq) H + + HSO 4 - 2 H + + 2 CrO 4 -2 Cr 2 O 7 -2 + H 2 O (yellow solutions turns more orange as dichromate forms) (C) Sodium hydroxide was added to the mixture above NaOH Na + + OH - H + + OH - H 2 O 2 H + + 2 CrO 4 -2 Cr 2 O 7 -2 + H 2 O (as H + is consumed, reaction shift to the left, back to yellow) Investigation 2: Precipitation of Barium Chromate (A) Barium chloride was reacted with potassium chromate BaCl 2 Ba +2 + 2 Cl - K 2 CrO 4 2 K + + CrO 4 -2 Net ionic: Ba +2 + CrO 4 -2 BaCrO 4 (yellow ppt, slightly yellow solution as solid ionizes) (B) Hydrochloric acid was added to the mixture above HCl (aq) H + + Cl - 2 H + + 2 CrO 4 -2 Cr 2 O 7 -2 + H 2 O (what little CrO
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 / 3

Exp%204%20grading%20-%20products%20and%20reactants%20-%20f07...

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