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Physical and chemical changes abstract
What is the effect of temperature on reactions
Physical and chemical changes abstract
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This research includes information about Alka-Seltzer and it’s correlation with chemical reactions. Many people use the chemical reaction of Alka-Seltzers to heal themselves. Heat and cold can strongly affect the speed of a chemical reaction. This science project will determine the effect heat has on the reaction between a seltzer tablet and beakers of water. The temperatures will be extremely cold, cold, room temperature, hot, and boiling water. Alka-Seltzer is a medication that works as a pain reliever and an effervescent antacid. Antacids help neutralize stomach acidity, which can cause heartburn.The pain reliever used is aspirin and the antacid used is baking soda, or sodium bicarbonate. It relieves minor aches, pains, inflammation, fever, …show more content…
There are a few key concepts to chemical changes. A physical change, such as state change or dissolving, does not create a new substances, but a chemical change does. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. To take the tablets, they're fully dissolved in water, where they famously undergo a chemical reaction that produces lots of carbon dioxide bubbles—or fizz. As the tablets dissolve, the sodium bicarbonate splits apart to form sodium and bicarbonate ions. The bicarbonate ions react with hydrogen ions from the citric acid to form carbon dioxide gas (and water). This is how the bubbles are made. Some chemical reactions, such as rusting, take a long time. Others, such as burning, take a very short amount of time. Exothermic reactions are chemical reactions such as: burning coal, rusting, and exploding gunpowder, give off heat. Because reactions liberate heat, they increase the ambient temperature. Endothermic reactions are chemical reaction such as combining nitrogen and oxygen. Endothermic reactions take in heat, reducing the ambient temperature. Simply, if the end result is to give off heat, the reaction is exothermic; otherwise it is
This experiment will show how the temperature of water will affect how quickly a Alka-Seltzer tablet will dissolve. (Rowland) This experiment seemed appealing to me because it sounded interesting to experiment with chemical reactions. “How does the temperature of water affect how quickly an Alka-Seltzer tablet will dissolve?”
3. Drop tablet of Alka-Seltzer into the cold beaker of water and time length of reaction with a stopwatch
Combustion is a rapid, continuous reaction that usually takes place in the gas phase. Wood is an organic compound primarily comprised of cellulose. For wood, the phase change from a solid to gas is almost instantaneous as combustion occurs (Coleman, et al. 95). Ignition occurs when an outside source is no longer needed to sustain combustion (Coleman, et al. 87).
The Alka-Seltzer tablet is a medicine tablet taken by people as an antiacid to help calm down stomach acids which can lead to heartburn.(¨Carbonation Countdown¨) The Alka-Seltzer tablet is also used as a pain reliever. The pain reliever has aspirin and citric acid in it while the antiacid also has citric acid but instead of aspirin the antiacid has sodium bicarbonate, which is also known as baking soda. The Alka-Seltzer tablet was first created by a chemist working for the company Miles Laboratory named Joseph Maurice Treener. (¨Who invented Alka Seltzer¨) Treener discovered that if he added sodium bicarbonate to aspirin it would create a tablet that works wonders to use as a medication to calm down troubled stomach acid.
On television, there are commercials on Alka-Seltzer tablets. If you haven’t seen any well Alka-Seltzer tablets are tablets that give you fast relief remedy. Well, when you drop one of these tablets into water it starts to make bubbles. You could sort of compare this to a soda when the bubbles start to fizz up. The bubbles the tablets start to create are carbon dioxide gas. But the carbon dioxide are created by a chemical reaction that happens when the tablet starts to dissolve in water. You’re probably wondering what makes up these tablets? Well, it is mainly citric acid, aspirin and sodium bicarbonate. The sodium bicarbonate dissolves into the water and when it does dissolve it splits apart into sodium and bicarbonate ions. The bicarbonate
An endothermic reaction is a chemical reaction in which heat from the surrounding air is incorporated into the reaksie.5 The equation Between baking soda and vinegar are: CH3COOH + NaHCO3 -> CO2 (g) + NaC2H302 (aq) + H20 (1 ) .The reaction releases carbon dioxide release that heat energy required het.Die heat taken from the ambient air that the container in which the reaction occurs cold maak.Die carbon dioxide the pressure / gas provided in gas soda gebruik.6Die temparatuur fall because new bonds are formed and why he so heat energy to take as he needs energy to form the new bonds touch the liquid colder it is still an endothermic reaction. When vinegar with baking soda reacts an endothermic reaction formed. The other equation is: HC2H302-1- NaHCO3 = CO2 (g) + NaC2H3O2 (aq) + H20 (1) .1 Baking soda (NaHCO3) is also known as natruimbikarbonaat. It is
the reaction; if it speeds it up, slows it down or changes it in any
For example, a study from the Voice Institute of New York found that drinking alkaline water with a pH of 8.8 can help deactivate pepsin. Pepsin is the main enzyme that causes acid reflux. Another study published in the Shanghai Journal of Preventive Medicine suggests that drinking alkaline water may be beneficial for people who suffer from high blood pressure, diabetes, and high cholesterol. Meanwhile, the study from the University of Alberta concludes, “it would be prudent to consider an alkaline diet to reduce morbidity and mortality of chronic disease that are plaguing our aging
A warm water was prepared by heating approximately 100mL of distilled water in a 400mL beaker along with few boiling chips to 45-50 ℃.
Investigating the Effects of Temperature on the Rate of Reaction between Magnesium and Hydrochloric Acid Introduction Chemical kinetics is the study and examination of chemical reactions regarding re-arrangement of atoms, reaction rates, effect of various variables, and more. Chemical reaction rates, are the rates of change in amounts or concentrations of either products or reactants. Concentration of solutions, surface area, catalysts, temperature and the nature of reactants are all factors that can influence the rate of reaction. Increasing the concentration of a solution allows the rate of reaction to increase because highly concentrated solutions have more molecules and as a result the molecules collide faster. Surface area also affects reaction rate because when the surface area of a reactant is increased, more particles are exposed to the other reactant.
One vital process in the human body observed in chemistry is the idea of chemical kinetics. Chemical kinetics is the study of the rate of reactions, or how fast reactions occur.1 Three factors that affect chemical kinetics are concentration, temperature, and catalysis. As the concentration of a substance increases, the rate of the reaction also increases.1 This relationship is valid because when more of a substance is added in a reaction, it increases the likelihood that the
Overall my aim from the experiment conducted was achieved as; the factors that affect the rate of a chemical reaction were discovered. My hypotheses were proven as; a catalyst increases the speed of a reaction, larger surface area have a faster reaction rate, additional stirs make the reaction occur faster, the higher concentration levels quicken the rate of a reaction and temperature speeds up the reaction time. The investigation was a fair test as all variables were controlled as my results support this. Although the practical activity could be improved if it was to be repeated. Altogether it was a fantastic learning experience that I am grateful for participating in.
So what exactly is matter? Matter is anything that has mass and takes up space (blue book). The particle model, however, is different for the four types of matter. For solids, the molecules can only vibrate, but solids have a definite shape and volume. For liquids the molecules are able to slide past one another and has definite volume. Both gas and plasma don't have a definite shape or volume, but in gas the molecules can move freely and bump into each other, and in plasma the molecules have completely broken apart. These molecules are too small to see and are different for every object. So what do particles have to do with vinegar and baking soda reacting? Well acids and bases are made of elements. These elements are made of atoms which are made of molecules. So when you get down to it, the reaction between acids and bases all depend on the particles of the object.
My aim in this piece of work is to see the effect of temperature on the rate of reaction in a solution of hydrochloric acid containing sodium thiosulphate. The word equation for the reaction that will occur in the experiment is: Sodium thiosulphate + hydrochloric acid →, sulphur + sulphur dioxide +. sodium chloride + water ? where the sulphur is an insoluble precipitate.
The formation of an odor is when chemical changes create a smell. For example when something rots it usually smells disgusting. Temperature change happen sometimes because chemical changes are normally accompanied by it. For example if you burn paper it will become much hotter. The formation of bubbles is another sign of chemical change, for example when you mix baking soda and vinegar it creates many bubbles. Finally formation of a solid may form, called precipitate. All in all chemical changes may have occurred if you observe some of these five factors.