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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: macca69831 on February 07, 2010, 05:46:46 pm

Title: Chemical Equations Questions
Post by: macca69831 on February 07, 2010, 05:46:46 pm

My teacher gave me this booklet of questions to do and I couldnt do these four:

Write chemical equations for the following equations:
Q1
a) Carbon Dioxide (an acidic Oxide) reacting with lithium hydroxide
b) Zinc Carbonate being decomposed by heating
c) Ethyne, C2H2, being burnt during some oxyacetylene welding

Q2.
If dicromate ions, Cr2o72-,are mixed with iodine ions, I-, iodine, I2, and chromium (III) ions are produce. Write the overall ionic equation for this reation

Title: Re: Chemical Equations Questions
Post by: stonecold on February 07, 2010, 06:17:56 pm

1.a)     2LiOH + CO₂ --->  Li₂CO₃ + H₂O

b)       ZnCO₃ ---> ZnO + CO₂

c)       2C₂H₂ + 5O₂ ---> 4CO₂ + 2H₂O

2.       6I^- + Cr₂O₇^2- + 14H⁺ ---> 3I₂ + 2Cr³⁺ + 7H₂O

Title: Re: Chemical Equations Questions
Post by: macca69831 on February 07, 2010, 06:30:39 pm

Thanks