Aim:
The aim of this investigation is to investigate the rate of reaction of magnesium (mg) with hydrochloric acid (HCl).
After studying the availability of equipment I have chosen to investigate how concentration can affect the rate of reaction. Other variables that affect this investigation are:
– Concentration of solution
– Temperature
– Surface area of a solid
– Catalyst
– Light
– Pressure of a gas
Prediction:
I predict that when changing the concentration of hydrochloric acid and water, the slower the rate of reaction will be. I think this because when observing a previous experiment, it showed the less Hydrochloric acid and the more water used in a test tube, the rate of reaction is slow.
Scientific knowledge:
To help me gain better knowledge about the investigation I have found out some scientific information relating to the experiment of ‘rates and reaction’. The main areas I have covered are concentration of solution, temperature and catalyst.
After researching my scientific evidence I have found out that depending on collisions in particles will depend on the reaction being faster or slower. This happens if the reacting particles collide with each other, or there is sufficient energy in the collision to overcome the activation energy.
The Essay on Nvestigating The Rate Of Reaction Between Marble Chips And Hydrochloric Acid
Planning I will use marble chips and different concentrations of hydrochloric acid and water to see how it affects the rate of reaction. I will use concentrations of 50cm3 using different volumes of water and acid. Introduction I am investigating how the rate of reaction between marble chips and hydrochloric acid is altered when the concentration is changed. This is the word equation for my ...
Concentration
To increase the rate of reaction, the concentration of the reaction needs to increase this is by the
Hydrogen and magnesium ribbon being added to the solution of Hydrochloric acid. The following reaction occurs:
Temperature
If temperature is increased the rate of reaction also increase. This is by the chemical particles receiving kinetic energy. If more kinetic energy is present in the particles, the particles move faster, this also means the particles will be colliding with each other often.
Catalysts
A catalyst is a substance that changes the rate of reaction but remains unchanged itself therefore it is an element that changes the rate of a chemical reaction without being used up. For example, iron speeds up the reaction between nitrogen and hydrogen to make ammonia.
Equipment:
test tube Rack
2 Measuring Cylinders
5 Magnesium Strip
Hydrochloric Acid
Test Tubes
Sand Paper
Stop Clock
Water
Method:
1. Collect all equipment; cut 5 magnesium strips (10cm) the same size. After that, using the sandpaper, sand any Magnesium Oxide layer (rust) off the magnesium strips.
2. Collect the hydrochloric acid and measure out 10ml in the measuring cylinder, pour in the test tube. Put test tube in the test tube rack.
3. Measure 8ml of hydrochloric acid and 2ml of water in the other measuring cylinder, and then pour in another test tube, again place in the test tube rack.
4. Measure 7ml of hydrochloric acid and 3ml of water and pour into another test tube. Place tube in test tube rack.
5. Measure 6ml of hydrochloric acid and 4ml of water and pour into another test tube and then place in the test tube rack.
6. Finally measure 5ml of hydrochloric acid and then 5ml of water and pour it into the last clean test tube, and then place in the test tube rack.
7. By using the stop clock, collect one strip of magnesium and drop it in the first test tube. As soon as the strip touches the acid start the stop clock. Observe what happens to the strip and note down any observations you can see. As soon as the strip is invisible stop the stop clock, and note down the time. Do the same with the four concentrations.
The Coursework on Concentration Of Acid Reaction Magnesium Rate
... then put 0 cm of water into the test tube to dilute the concentration of acid. I did this to see if the experiments ... this investigation is to find out how concentration of acid affects the rate of reaction between hydrochloric acid and magnesium ribbon. The rate of a ...
8. To make the experiment a fair test repeat two times. Collect observations/results.
Fair test:
To make sure my experiment was a fair test, I double-checked the measurements of all my solutions. To gain a set of accurate results I did the experiment again. I assured that the volume of the concentration was always the same-10ml. By carrying out the following my experiment was fair.
Results:
Below are my tables of results.
HCL (ml)H20 (ml)Time (minutes:seconds)Brief description
10ml0ml00:12Exothermic, smoke, rapid, lots of fizzing
8ml2ml00:16Exothermic, smoke, quickly fizzing
7ml3ml00:21Exothermic, slower fizzing, slight smoke
6ml4ml01:00Exothermic, slow fizz
5ml5ml01:05Slow fizz
HCL (ml)H20 (ml)Time (minutes:seconds)Brief description
10ml0ml00:14Exothermic, smoke. Rapid, lots of fizzing
8ml2ml00:18Exothermic, smoke, quickly fizzing
7ml3ml00:35Exothermic, slower fizzing, slight smoke
6ml4ml01:09Exothermic, slow fizz
5ml5ml01:16Slow fizz
HCL (ml)H20 (ml)Concentration (m)Time Experiment 1Time
Experiment 2Average time (seconds)1/average time
10ml0ml200:1500:1900:175.88
8ml2ml1.600:1900:3300:262.84
7ml3ml1.400:2500:4200:33½2.98
6ml4ml1.201:0201:0501.03½0.96
5ml5ml1.001:0801:1201:100.90
Conclusion:
From observing my results and studying my graphs, I have found out that the more hydrochloric acid you have in the concentration then the higher the rate of reaction will be. To decide which concentrations I will be using for my experiment,
After deciding to investigate a range of different types of concentrations between 10mls of hydrochloric acid to 5mls of hydrochloric acid, and 5mls of water. I found out that the more water added to concentrations, all reactions slowed down. In conclusion my prediction was right. I predicted that the more water added to concentrations, the slower the rate of reaction.
Evaluation:
My method helped me make my experiment successful. Without it I would be confused and lost, it helped me make sure my experiment was carried out to my best ability. My experiment that I carried out was fair. All my measurements were accurate, as I doubled-checked them.
The Term Paper on Experiment to Investigate Osmosis in Potatoes
The aim of this experiment is to investigate the movement of water in and out of plant cells. The cells chosen for study will be taken from potato tubers. Firstly I will explain what osmosis is. Osmosis is the passage of water from a region of high water concentration through a semi permeable membrane to a region of low water concentration. This definition contains three important statements: a) ...
If I could do this experiment again, I would do the experiment again, this should hopefully give me an extra set of results that prove my results are reliable and my prediction is right. This all depends if I have more time to do so.
