Sodium Hydroxide Preparation

Introduction Alka-Seltzer has been on the market since 1931 and has helped to relieve indigestion and upset stomach. The tablets began to fizz and bubble when dropped into water. “The fizziness happens when baking soda (sodium bicarbonate) and citric acid react chemically in water. They yield sodium citrate, water and carbon dioxide gas, which causes bubbles.” Based on this information, we will measure the reaction time of AlKa- Seltzer dissolved in 200 ml of water at 3 different tempertures in the first portion of this experiment.

Sulfuric acid was added to the distilled water, drop by drop until the solution had a pH of about 4.0. The bottle was labeled “Acid Rain” with a sharpie. Container 3: Alka-seltzer 650mL of water was added to the container 6 alka-seltzer tablets were dissolved into the water.

2KAl(OH)4 (aq) + H2SO4 (aq) → 2Al(OH)3 (s) + K2SO4 (aq) + 2H2O (l) In this acid-base/precipitate reaction, the sulfuric acid added to the potassium aluminum hydroxide formed aluminum hydroxide, the white, jello-consistency precipitate that was observed. Potassium sulfate and water were also formed. 3. 2Al(OH)3 (s) + 3H2SO4 (aq) → Al2(SO4)3 (aq) + 6H2O (l) Immediately after the precipitate was formed, the third, acid-base/metathesis reaction started.

Sodium Bicarbonate mixed with Hydrochloric acid. The chemical reaction observed showed that there was fizzing and bubbling, this is evidence that a new gas was being produced. This new gas, CO2 was generated from the reaction. After the fizzing stopped a liquid was leftover leading me to conclude the liquid leftover leading me to conclude the liquid leftover was the NaCl and H2O 4. You found a sample of a solution that has a faint odor resembling vinegar (an acid).

It’s mainly found in chloride minerals, which is also known as sodium chloride or commonly known as salt.

Weighed 1 gram of NaC2H3O2 and mixed it with ionized water. Boiled 12 mL of 1.0M Acetic Acid added into a beaker containing the sodium carbonate on a hot plate until all the liquid is evaporated

Standard Sodium hydroxide solution is the alkaline solution that will be used to titrate with soda water as it is a common solution that can be easily found in an ordinary school laboratory. It is a strong base. Carbonic acid is a weak acid which will react with a strong base to form a basic (pH > 7) solution. When Phenolphthalein is added to Soda water, the resultant solution is colourless. After titration with a strong base (sodium hydroxide), the solution will turn to pink as the solution becomes

Alka Seltzer mixture mainly consists of 3 active ingredients; aspirin, citric acid and sodium bicarbonate. The functions of the following components are as follows; Aspirin acts a pain reliever and as an anti-inflammatory (which reduces swelling and inflammation). It does this by preventing the action of a substance known as cyclo-oxygenase which produces chemicals in the body. Sodium hydrogen carbonate and citric acid neutralizes and reduces stomach acid when they react with water.

The sodium citrate then dissociates in aqueous solution to form citrate ions that are able to form a buffer solution. This allows the Alka Seltzer to act as an antacid by neutralising the excess acid in the stomach, as H+ is used to form citric acid. The excess HCO3- ions in the aqueous mixture also act as a buffer which helps to reduce the acidity, further functioning as an antacid. (Shakhashiri B, 1989.) The aspirin in Alka Seltzer acts as an analgesic and also as an anti-inflammatory drug.

Then the balloon is lifted up so that the baking soda runs into bottle to react with the vinegar inside. Immediately the balloon is inflated by the carbon dioxide formed. The baking soda is kept constant when the experiment is repeated for another different amount of vinegar. Results/Findings When sodium bicarbonate and vinegar mix,

4.) What is the formula of the compound you chose for your crystal? The formula for an Epsom salt crystal is (MgSO4) 7H2O. 5.)

Salt (NaCl) is primarily an electrically neutral crystalline substance produced by the reaction of a base—sodium—and an acid—chloride. Salt is technically formed when a cation (a positively charged ion) combines with an anion (a negative ion) to become electrically neutral. Salt causes freezing point depression when combined with ice. In order for salt to begin the melting process, it must come in contact with water. Fortunately, a thin film of water can generally be found on top of ice and snow.

The tablets have 3 main ingredients: aspirin (salicylic acid), sodium bicarbonate, and citric acid. When the Alka-Seltzer

Properties of Ionic and Covalent Substances Lab Report Introduction The purpose of this lab was to determine which of the following substances: wax, sugar, and salt, are an ionic compound and which are a covalent compound. In order to accurately digest the experiments results, research of definitions of each relating led to the following information: ionic compounds are positive and negatively charged ions that experience attraction to each other and pull together in a cluster of ionic bonds; they are the strongest compound, are separated in high temperatures, and can be separated by polar water molecules. A covalent compound forms when two or more nonmetal atoms share valence electrons; covalent compounds are also

The equation of the reaction between sodium hydroxide and ethanoic acid is as follows: CH3COOH + NaOH → CH3COONa + H2O We can measure the end point of titration process and we can also measure the amount of reactants. The concentration of ethanoic acid in the vinegar can be determined through stoichiometric calculations, Using the values obtained from the titration, and also the chemical equation as a reference. Phenolphthalein indicator is used in this acid-base titration Equipment and materials: