How long does it takes a strip of magnesium to dissolve in a solution of water and acid
Introduction
I am aiming to find out how long it takes for a strip of magnesium, to dissolve, in a solution of water and acid.
Variables
Ø Concentration of acid
Ø Length of Magnesium
Ø Temperature of water
Ø Temperature of acid
Ø Amount of acid
Ø Size of conical flask
Ø Time taken
Fair test
The variable I will change is the concentration of acid. I will keep the length of the magnesium the same, as with the temperature of the water, amount of acid, size of conical flask and time taken. To make it a fair test.
Plan – Safety
Put safety goggles on
Equipment list
Ø Conical flask
Ø Stop watch
Ø 2 molar acid
Ø Magnesium strips
Ø Measuring cylinder
Instructions
1) Firstly I collected all my equipment
2) Measure 50ml of acid into a measuring cylinder
3) Pour acid into conical flask
4) Cut off a piece of magnesium (5cm)
5) Put the piece of magnesium into the conical flask and start the stop watch
6) Watch the reaction take place, and when all of the magnesium dissolves, stop the clock
7) Record the time in your table
8) Repeat this process twice
9) Repeat the whole process for the different concentrations of acid.
Prediction
GRAPH
I predict that the higher concentration of acid, the faster the magnesium strip will dissolve. In the higher concentration acid there will be a higher number of hydrochloric acid particles, in the same volume. This will result in more collisions, which therefore speeds up the rate of reaction, which will cause the magnesium to dissolve quicker. GRAPH
Conclusion
I have found out, by looking at my graph and results table, that the higher the concentration of acid, the faster the magnesium will dissolve. This happens because more collisions are happening in the same volume.
This is caused by more hydrochloric acid particles being added to the solution. Evaluation
As you can see on my graph, there are no anomalous results. This clearly shows that all of my results were reliable.
The rate at which Alka-Seltzer tablets reacts with water Statement of problem The aim of the experiment is to find out the rate at which Alka-Seltzer tablets react with water. The input variable that I will change is temperature. The output variable will be measured by the time it takes for the Alka-Seltzer tablets to dissolve.
We began this investigation by suiting up in lab aprons and goggles, we then gathered our materials, found a lab station and got to work. We decided to start with the magnesium in hydrochloric acid first, we measured out 198.5 L of HCl and put it in the foam-cup calorimeter and took initial temperature reading. We then selected a piece of magnesium ribbon and found its mass: 0.01g. This piece was placed in the calorimeter and the lid was shut immediately to prevent heat from escaping. We “swirled” the liquid mixture in the calorimeter to ensure a reaction, and waited for a temperature change. After a few moments, the final temperature was recorded and DT determined.
9. When all magnesium has reacted, remove the lid and heat strongly for 5 minutes
Investigating the Effect of Concentration on the Rate of Diffusion Aim: To find out if concentration affects the rate of diffusion. Prediction: I predict that the higher the concentration of acid the faster the reaction will be. Hypothesis: Diffusion is the spreading out of a gas or liquid from an area of low concentration to another area where it has a lower concentration until the overall concentrations are balanced. The Hydrochloric acid (HCl) diffuses into the gelatine cube of which contains Sodium Hydroxide (NaOH), which is an alkali. When the Hydrochloric acid combines with the Sodium Hydroxide they form salt and water, which is neutral therefore turning the pink cube to clear.
Magnesium is an important element necessary healthy bones and teeth. The use of all muscles, and nerves convert it into energy for daily living. It is also instrumental in maintaining adequate levels of calcium in the blood. Having a therapeutic magnesium level helps prevent cardiovascular disease and reduces the risk of bone loss. The body of the adult human contains about 2000 mEq of Mg. Half of this amount stays within the skeleton and the other half in soft tissues (Wacker and Parisi 1968). The normal concentration in the blood is somewhere in the ranges of 1.7-2.3 mg/dL (Magnesium, 2013)
The Effect of Temperature of Hydrochloric Acid on the Rate of Reaction Between Hydrochloric Acid and Magnesium
Rate of Reaction Between Marble Chips and Hydrochloric Acid. The aim of this experiment is to find out how different variables affect the rate at which the reaction between Marble chips (CaCO ) and Hydrochloric acid (HCl) is used. There are many variables that affect the rate of this reaction such as the following. 1.
The Effect of Concentration of Hydrochloric Acid on the Rate of Reaction with Magnesium Aim: To investigate the effect of concentration of hydrochloric acid on the rate of reaction with magnesium Prediction: As the concentration of the hydrochloric acid increases, so will the rate of reaction Hypothesis: In a reaction, particles of two different reactants react together to form a product. The reaction only takes place on account of two things, if the particles collide, and if the collision has enough 'activation energy'. The two reactant particles, in this case magnesium particles and hydrochloric acid particles, must collide with each other on the correct 'collision course'. If this does not occur then no chemical reaction will take place. The reaction must also have enough energy, this can be affected by temperature, the more heat the particles have the faster they move and so the more energy therefore more chance of successful collisions.
The first step that we took to accomplish our goal was to put on our safety goggles and choose a lab station to work at. We received one 400ml beaker, one polyethylene pipet, two test tubes with hole rubber stoppers, two small pieces of magnesium (Mg), one thermometer and a vial of hydrochloric acid (HCl). We took the 400ml beaker and filled it about 2/3 full of water (H20) that was 18 OC. Then we measured our pieces of Mg at 1.5 cm and determined that their mass was 1.36*10-2 g. We filled the pipet 2/3 full of HCl and poured it into one of the test tubes. Then, we covered the HCl with just enough H2O so that no H2O would be displaced when the stopper was inserted. After inserting the stopper, we placed the Mg strip into the hole, inverted the test tube and placed it in the 400ml beaker. HCl is heavier than H2O, so it floated from the tube, into the bottom of the beaker, reacting with the Mg along the way to produce hydrogen gas (H2). We then measured the volume of the H2, cleaned up our equipment and performed the experiment a second time.
In this lab, I determined the amount of heat exchanged in four different chemical reactions only using two different compounds and water. The two compounds used were Magnesium Hydroxide and Citric Acid. Both compounds were in there solid states in powder form. Magnesium Hydroxide was mixed with water and the change in heat was measured using a thermometer. The next reaction combined citric acid and magnesium hydroxide in water. The change in heat was measured as well. For the third reaction citric acid was placed in water to measure the change in heat. In the last reaction, citric acid was combined with water. The heat exchanged was again measured. It is obvious we were studying the calorimetry of each reaction. We used a calorimeter
in a set time. For example if a potato chip is cut in a wavy shape or
The melting point for magnesium is 923 K (650°C or 1202°F) and the boiling point is 1363 K (1090°C or 1994°F). Magnesium ions are extremely soluble in water which makes it the third most abundant element dissolved in seawater. The pure element of Magnesium burns and gives off a brilliant-white light, making it a useful ingredient in flashlight photography, flares and pyrotechnics (Gagnon, 2012). Once ignited, magnesium is extremely difficult to extinguish. Attempting to put out the fire using water produces hydrogen, this only intensifies the flames. Magnesium also burns in both pure nitrogen and pure carbon dioxide, so a carbon dioxide fire extinguisher will feed the flames too.
with a tong to see if the magnesium had started to burn and also to
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid
An investigation into how changing one variable influences the rate of reaction between marble chips and dilute Hydrochloric acid