Aim
I am going to investigate what factors change the rate of reaction between marble chips and hydrochloric acid.
Prediction
I predict that the more marble chips there are, the faster the rate of reaction, because there is more marble for the hydrochloric acid to react with, I predict this because in previous experiments when working with the same equipment I found that if you put a lot of marble in the acid, the levels of water in the burette go down very quickly, compared to when you only put a little bit of marble in the acid and the levels of water go down much slower. I also predict that the hotter the temperature of acid, the faster the rate of reaction, because heat often works as a catalyst in experiments with acid. Increasing the temperature of the acid will increase the rate of reaction because particles move faster and collide more vigourously at higher temperatures.
Plan
I will fill a burette with water, and then turn it upside down in a beaker full of water. I will then put a tube into the bottom of the burette and attach it to another beaker using a bung to stop any air from leaking. I will then calculate the rate of reaction between the marble chips and hydrochloric acid by measuring how much the levels of water in cm³ drops every 10seconds.
So that it is a fair investigation I will make sure that I always start with 50cm³ of water in the burette, and 1000cm³ of acid in the beaker. I will also make sure that I take readings every 10 seconds, because otherwise my results would be invalid, or have results missing.
I am going to investigate what factors change the rate of reaction between marble chips and hydrochloric acid.
Prediction
I predict that the more marble chips there are, the faster the rate of reaction, because there is more marble for the hydrochloric acid to react with, I predict this because in previous experiments when working with the same equipment I found that if you put a lot of marble in the acid, the levels of water in the burette go down very quickly, compared to when you only put a little bit of marble in the acid and the levels of water go down much slower. I also predict that the hotter the temperature of acid, the faster the rate of reaction, because heat often works as a catalyst in experiments with acid. Increasing the temperature of the acid will increase the rate of reaction because particles move faster and collide more vigourously at higher temperatures.
Plan
I will fill a burette with water, and then turn it upside down in a beaker full of water. I will then put a tube into the bottom of the burette and attach it to another beaker using a bung to stop any air from leaking. I will then calculate the rate of reaction between the marble chips and hydrochloric acid by measuring how much the levels of water in cm³ drops every 10seconds.
So that it is a fair investigation I will make sure that I always start with 50cm³ of water in the burette, and 1000cm³ of acid in the beaker. I will also make sure that I take readings every 10 seconds, because otherwise my results would be invalid, or have results missing.
