Investigating the effect of changing concentration on the rate of reaction

Here is my experiment write-up on the effect of changing concentration on the rate of reaction: I have tried to embed it but if it doesn't work, here is the link:
https://docs.google.com/document/pub?id=1YQu2SBVzgztkAJ-2xsccJAWCSeKpQdVithbqXvBaJYg