An Experiment to Find Out How Much Gas is Given Off When Hydrochloric Acid and Marble Chips React
Aim
===
The aim of this experiment is to find out how much gas is given off by
marble chips when they react with hydrochloric acid. This will tell me
if the concentration of hydrochloric acid affects the speed of
reaction.
Variables
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I could change: the temperature, the percentage of hydrochloric acid,
the number of marble chips, or the size of the marble chips.
I will change the percentage of hydrochloric acid there is for the
marble chips to react with.
I will keep the temperature, the number of marble chips, and the size
of the marble chips the same. I will do all of the experiment on the
same day so that the temperature will be the same. If the temperature
increases the reaction would happen quicker, because the particles
would move around faster, so there would be more collisions. If the
temperature decreases the reaction would be slower, because the
particles would have less energy, and move slower. To keep the amount,
and the size of the marble chips the same, I will count out the number
of marble chips, and I will only pick chips of similar size. The more
marble chips there are and the smaller the size of the marble chips,
the more surface area there would be, so the quicker the reaction, and
there would be more gas produced. I will do this so that the
experiment is fair.
I could measure the rate of reaction by measuring how fast the
products are formed, or I could measure how fast the reactants are
used up. For this experiment I will measure the rate of reaction by
measuring how fast the products are formed, measuring the volume of
the gas given off over a certain amount of time. This would be more
accurate, because it would be easier to measure.
Fair Test
To make it a fair test, I will measure the amount of gas given off
then cut up 5 pieces of potato and weigh them to make sure they all
Investigating How the Concentration of Hydrochloric Acid Affects the Speed of the Reaction with Marble Chips
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(CNG). That's because the gas is confined to a pressure of approximately 3,600 pounds p...
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potato chips left in a sugar solution for a period of 1 hour. I will
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To improve the method, I would have used a machine to cut the chips to
We will do this about 4 times and see the difference and see if there is any change.
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What type of gas do they disperse in the chamber? The type of gas that
1. The labels have fallen off of three bottles thought to contain hydrochloric acid, or sodium chloride solution, or sodium hydroxide solution. Describe a simple experiment which would allow you to determine which bottle contains which solution.