This is as shown in the equation below:. The most rapid gas bubbles were observed in the acid reactions with powdered Magnesium metal. In acid-base chemical reactions, there are four main variables, which influence the rate of reaction. In this reaction, the magnesium and acid are gradually used up. Given that, the experiment was carried out under the same conditions, the data obtained are reliable and generalizable.
From the experimentation the aims of the experimentation have been achieved. In this reaction, the magnesium and acid are gradually used up. Prediction Given that, powdered Magnesium metal has a high surface area than equivalent lengths of Magnesium ribbon, we predict that the former will have shorter duration of reaction with hydrochloric acid than the latter. The experiment will be carried at a room temperature 25 0C. Corks are too porous and will leak. The aim of this experiment is to verify the effects of surface area of solid reactants and concentration of aqueous reactants on the rates of acid-base chemical reactions. Students follow the rate of reaction between magnesium and the acid, by measuring the amount of gas produced at 10 second intervals.
This is a low significance error since we based mostly on the disappearance of magnesium into the acid rather than disappearance gas bubbles. However, the experimentation had the following inconsistencies as shown the table below.
A reaction between Hydrochloric Acid and Magnesium ribbon. – GCSE Science – Marked by
Continue timing until no more gas appears to be given off. Rate-reaction trends of magnesium metal ribbon and powder with increasing concentration of HCl Calculations Cumulative average of reaction duration of: The experimental data show that using powdered Magnesium metal reduces the duration of reaction with HCl significantly.
Magnesium metal in form of a ribbon or powder reacts with acids rapidly than water liberating hydrogen gas.
The constants controlled variables The quantity of Magnesium metal used will be held constant by way of using equal lengths of Magnesium hydrocjloric and equivalent weights in grams of powdered Magnesium metal. Find more useful services for students Free plagiarism check Check your paper for free On-line tool.
Rate of Reaction of Magnesium and Hydrochloric Acid
Immediately cork the flask to the prepared gas delivery zcid. If magnesium ribbon is replaced with an equivalent weight of powered magnesium, does the rate of reaction between magnesium and hydrochloric acid double? These include the presence or absence of catalyst, temperature, concentration, and surface area of reactants.
The rate hydrochlodic gas bubbles The independent variables Increasing concentration of hydrochloric acid: This is as shown in the equation below:. This shows that the reaction is fastest at the start.
Although we had predicted and hypothesized that the duration of the reaction would be reduced by a half, the data partially supported the hypothesis since the data was Chemistry for higher tier: In addition, impurities may form on the surface of the magnesium metal therefore, slowing further the rate of reaction.
Clear your working bench. We also predict that reaction of powdered Magnesium metal with highest concentration of hydrochloric acid will take the shortest duration of reaction.
This is intended as a class practical. Variables Operationalization of variables The dependent variables Courseworj duration of reaction, time taken for Magnesium to dissolve in hydrochloric acid completely measured using a stopwatch in seconds.
The rate of reaction of magnesium with hydrochloric acid
Pour the acid into the cm 3 conical flask. Wrap the magnesium pieces immediately in an aluminum foil to prevent them from being re-oxidized. Study Variables The Dependent Variables: It is best if the students work in pairs because setting up and starting the experiment requires more than one pair of hands.
Chemicals and Reagents The following chemicals and reagents were required in the experimentation:. Apparatus Chemicals Eye protection Each group of students will need: Page last updated October Therefore, considering concentration factor and surface are factor of reactants it is evident that the rate reaction curve trends would not mabnesium linear as expected, dhemistry rather exponential.
Make sure you put on your personal protective clothing and safety goggles. Introduction In acid-base chemical reactions, there are four main variables, which influence the rate of reaction.