How does alka seltzer make gas

Heat was absorbed from the solution at the same time as the evolution of the gas was taking place. Now show students, the decomposition of hydrogen peroxide with and without a catalyst. The evolution of oxygen gas from hydrogen peroxide solution is an example of an exothermic process. This provides an excellent way of easing the confusion between kinetic and thermodynamic stability.

Most reactions proceed faster as the temperature increases. Is the same true for dropping an Alka-Seltzer tablet into water? Indeed it is!! Depending on the temperature of the water, the tablet will stay on the bottom of the container until the reaction is finished very cold water , or float on top of the water through-out the entire reaction warm water.

At a temperature in between the two extremes, the tablet will start off on the bottom of the container, then as its mass decreases, gradually move to the surface of the water.

Crushing the tablet into a fine powder can also be used to illustrate the effect of surface area on the rate of a reaction. A much safer although not as spectacular demonstration than blowing flour into a Bunsen Burner flame!!

Some students may initially expect that exothermic reactions should proceed much faster than endothermic reactions, but this is clearly not the case. The exothermic conversion of gasoline to the combustion products CO 2 and H 2 O is extremely rapid, but the reaction takes place only after the gasoline has been ignited. We can classify gasoline as being thermodynamically unstable relative to the products of combustion exothermic process , but kinetically stable reaction is very slow in the absence of a spark.

The rate at which a reaction takes place is a function of the height of the energy barrier between reactant and product. See the Materials section for details. Recommended Project Supplies. Get the right supplies — selected and tested to work with this project. View Kit. Share your story with Science Buddies! Yes, I Did This Project! Please log in or create a free account to let us know how things went. Science Buddies Staff. Accessed 12 Nov. Introduction You may have seen a television commercial for Alka-Seltzer tablets, or heard one of their advertising slogans: "Plop, plop, fizz, fizz, oh what a relief it is!

Figure 1. Alka-Seltzer tablet dissolving in water. The compounds on the left-hand side of the equation bicarbonate ions and hydrogen ions are called the reactants , and the compounds on the right-hand side of the reaction water and carbon dioxide are called the products. Bibliography Brown, W. P Retrieved September 13, Clark, J. Understanding Chemistry: Rates of Reaction Menu. Retrieved September 13, Note: A computerized matching algorithm suggests the above articles.

Introduction Alka-Seltzer has been on the market since and has helped to relieve indigestion and upset stomach. The tablets began to fizz and bubble when dropped into water. They yield sodium citrate, water and carbon dioxide gas, which causes bubbles.

The hydrate used in this lab was Copper ll Sulfate Pentahydrate. To heat the hydrate in this lab a crucible is needed. A crucible is a heat resistant container used to heat things to high temperatures.

In this lab a mole was used to determine the measurements of all substances. The aim of this experiment was to create Butyl Ethanoate by the process of reflux esterification using 1-Butanol , 16mL and Ethanoic Acid A catalyst sulphuric acid All reactants were heated under reflux for a total time of 45 minutes, boiling chips were added into the pear shaped flask to encourage even boiling and prevents the occurrence of superheating. The dependent variable is the rate of decomposition of water which is measured by the volume of hydrogen gas and oxygen gas in cm3 The independent variable is the voltage here as I increase it from Room temperature was 24 rtp and I carried out the whole experiment in the same room.

If the temperature increases the rate of electrolysis will increase. The concentration of the sulphuric acid which is 0. From synthesizing polymers to treating water to creating fertilizers, chemical reactions are important in nearly every aspect of daily life.

One job of Chemical Engineers is to classify, understand, and control these reactions to speed them up or slow them down. Chemical reactions occur when bonds within molecules are broken or formed. There are several things that signify that a chemical reaction took place. These include a change in color, the production of a gas or solid, and of course a change in chemical composition. The starting chemicals before a reaction are called the reactants , and the chemicals that are produced are called the products.

The reaction in this activity involves using sodium bicarbonate and citric acid to produce water and carbon dioxide. The tablets contain sodium bicarbonate NaHCO 3 and citric acid.