An experiment on the effects of concentration of acids to the rate of reaction

A few weeks ago, I was looking for a new reaction that could be used to investigate how concentration affects reaction time.

An experiment on the effects of concentration of acids to the rate of reaction

Nutritional Deficiencies - Mineral, Vitamin, Amino Acids and Fatty Acids

Rate of Reaction of Magnesium and Hydrochloric Acid Introduction In acid-base chemical reactions, there are four main variables, which influence the rate of reaction.

These include the presence or absence of catalyst, temperature, concentration, and surface area of reactants. Temperature influences the rates of reaction through kinetic energy, such that high temperatures increase the kinetic energy of reacting molecules therefore causing frequent collisions, which form products faster.

High concentrations imply that more reacting molecules are at high proximity to each other therefore intermolecular collisions are frequent therefore forming products frequently.

Reactants with high surface area provide a greater binding surface for other reacting molecules, and therefore increase the number of successful collisions at any moment.

To measure, the effect of each of above factors, one has to hold some factors constant during rate reaction experimentation. Therefore, this study intends to investigate the effect of concentration and surface area of reactants on the rate of chemical reactions.

Magnesium metal in form of a ribbon or powder reacts with acids rapidly than water liberating hydrogen gas.

What You’ll Learn

For stance, magnesium metal reacts with hydrochloric to form magnesium chloride salt while displacing hydrogen from the acid as hydrogen gas.

This is as shown in the equation below: If magnesium ribbon is replaced with an equivalent weight of powered magnesium, does the rate of reaction between magnesium and hydrochloric acid double? Aims and objectives of the experiment 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.

Therefore, we sought to test the duration of reaction of equal lengths Magnesium ribbons with reducing concentrations of hydrochloric acid.

Similarly, the duration of reaction will be determined using equivalent weights of powdered Magnesium metal.

The experiment will be carried at a room temperature 25 0C. Study Variables The Dependent Variables: The measured duration of acid-metal reaction in seconds and the rate of gas bubbles.

The concentration of hydrochloric acid used and the surface area of the Magnesium metal used. The Controlled Variables constants: The quantity of the Magnesium for each test will be held constant.

For the Magnesium ribbon, the lengths of the Magnesium ribbon used will be constant, while quantities of powdered Magnesium metal in grams will be equivalent to the weight of the length of magnesium ribbon used. The experiment will be carried out at room temperature 25 0C The study variables are summarized in the table below: Variables Operationalization of variables The dependent variables The duration of reaction, time taken for Magnesium to dissolve in hydrochloric acid completely measured using a stopwatch in seconds.

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The rate of gas bubbles The independent variables Increasing concentration of hydrochloric acid: This will be changed by changing dilution factor. Surface area of Magnesium ribbon: This will be changed by using Magnesium ribbons and powdered Magnesium metal in separate experiments.This is a reaction which is often used to explore the relationship between concentration and rate of reaction in introductory courses (like GCSE).

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An experiment on the effects of concentration of acids to the rate of reaction

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Thomas Greenbowe | Department of Chemistry and Biochemistry