Purpose The purpose of the experiment was to examine the amount of acid neutralized by using an unknown sample of antacid. Theory Antacids are the oldest most effective known medications for treating heartburn.4 An antacid is used to neutralize hydrochloric acid, the gastric acid found inside the stomach. When the hydrochloric acid backs up out of the stomach and into the esophagus it causes heart burn.1 The antacids contain a mixture of weak bases such as magnesium hydroxide Mg(OH)2, aluminum hydroxide Al(OH)3, and calcium carbonate CaCO3.The weak base in the antacid neutralizes the hydrochloric acid and relieves heart burn.4 According to Svante Arrhenius an acid is a substance that produces hydronium ions (H+) and a base is a substance …show more content…
Equal amounts of fifty milliliters of hydrochloric acid and sodium hydroxide were obtained. The fifty milliliters of hydrochloric acid was added to the Erlenmeyer flask containing the antacid. The flask was swirled to allow the samples to completely dissolve. Approximately three drops of the bromocresol green indicator was added to the solution in the Erlenmeyer flask. The solution then turned urine yellow in color. A buret was obtained and cleaned out with deionized water to eliminate any remnants. The fifty milliliters of sodium hydroxide was then poured into the buret and the initial amount was recorded from the buret. The sodium hydroxide was then gradually titrated into the Erlenmeyer flask. With each drop of sodium hydroxide the flask was swirled to allow the solution to mix. The sodium hydroxide was added until the urine yellow solution in the flask turned a sea foam green color to detect the …show more content…
This procedure was conducted a total of three times. For each one of the trials the color change and calculations were recorded. The moles of hydrochloric acid neutralized by the unknown sample were found by subtracting the moles of sodium hydroxide (which was back titrated) , from the initial moles of hydrochloric acid. The moles of hydrochloric acid neutralized was then dived by the mass of pre weighed sample to give us the amount of moles of hydrochloric acid neutralized per gram of the unknown
There are three types of treatments to peptic ulcers antacids, antihistamine, and proton pump inhibitors (PPI). The most important and most effective remedy is the PPI, which is the strongest type of medicine out of the three types. PPIs work by inhibiting the release of protons (hydrogen ions) from the parietal cells (the source of acid secretion) to the lumen of the stomach1. There are many several types of PPI for the purpose of this research we will examine the efficacy of only two Omeprazole and
In this experiment, I was making a sample of aspirin and then testing it in order to see how pure the sample of aspirin was. By doing this experiment, I was leaning how to crystalize products, and then used the theoretical yield, along with the percentage yield in order to calculate the amount of aspirin that I had created in the sample. Aspirin is an anti-inflammatory, and analgesic, meaning this medication can reduce inflammation, fever, and pain by blocking the enzymes that promote these issues, and reducing the production of more of these enzymes all over the body.
The experiment was conducted in three parts: Part A of the experiment consisted of extracting caffeine from an aqueous solution; Part B consisted of using three different compounds: benzoic acid, succinic acid, and sodium benzoate; and the last part of the experiment consisted of using a solid neutral compound with an acid or base impurity.
Most substances fall on a scale ranging from the most acidic to the the most basic with neutral substances falling somewhere in the middle. Scientists call this the pH scale. pH levels are measured in numbers,0 to 14. The closer a substance is to zero the more acidic it would be. The closer to 14 the more basic a substance would be.Now what defines an acid and a base, one might ask? There are three ways of defining acids, each singling out a specific property. The first theory is the Arrhenius Theory with states, that an acid is a substance that produces the ion H+ when in a water solution, while a base is a substance which produces the ion OH- when in a water solution. Examples of an Arrhenius acid are HCl and HNO3. Examples of an Arrhenius base are NaOH and AlOH3.
Apparatus: * 1 measuring cylinder * 1 test tube * 1 stop clock * A large gelatine cube containing indicator and NaOH * Hydrochloric acid ranging from 1-3 molars * A scalpel Diagram: Method: * Take the large gelatine cube and cut into 15 equal pieces * Place on piece of the cube into the test tube * Measure out 10mls of HCl in the measuring cylinder * Pour the HCl into the test tube with the gelatine cube and start the clock * Time how long it takes for the pink colour inside the gelatine cube to completely disappear * You will also notice that the cube dissolves slightly * Record your results and repeat this same process 3 times for each molar of acid: § 1 molar § 1.5 molar § 2 molar
The purpose of this experiment is to investigate and compare the basic content of two antacids and also compare the prices and thus decide which antacid is more cost effective. This experiment is not hugely significant to the wider scientific community however it can help an uninformed consumer purchase a more cost effective antacid and understand how antacids work. The method used in this experiment is called a back titration. This involves adding HCl to an antacid tablet until an excess of HCl is reached and then titrating that solution against a 0.1mol NaOH solution. This will thus give us the number of moles each antacid neutralises. The average number of moles per gram neutralized by the Rennie tablets was 7.8409x10-3 moles. The average number of moles per gram neutralized by the Mylanta tablets was 6.3122x10-3 moles. It is obvious that Rennie antacids can neutralize more acid than Mylanta antacids. The Rennie antacids are also more cost effective as it costs less per tablet, they are more effective at neutralizing acid and therefore require a smaller dosage and also have no side effects unlike the Mylanta antacids which can cause diarrhoea.
Also the investigation will be performed in a sensible manner and there is no dangerous behaviour. Prediction When the experiment is taking place I believe that the magnesium in the hydrochloric acid will begin to bubble and then disappear, I also
Antacids may provide symptom relief but are not effective in healing peptic ulcer when use alone (Mayo Clinic, 2014).
* It was almost impossible to tell when the Alka-Seltzer tablet had dissolved, each time the experiment was done. This was a huge problem for the experiment as this could have totally caused problems to the experiment. A special type of detector apparatus, which bleeped when the correct amount of Alka-Seltzer tablet dissolved, could improve this, each time the experiment was done.
The conical vial was placed in a small beaker and allowed to cool to room temperature. The mixture was Cooled thoroughly in an ice bath for 15-20 minutes and crystals collected by vacuum filtration on a Hirsch funnel. The vial was rinsed with about 5 mL of ice water and transferred into to the Hirsch funnel and again washed with two additional 5mL portions of ice water. Crystals were dried for 5-10 minutes by allowing air to be drawn through them while they remained on the Hirsch funnel. The product was transferred to a watch glass plate and allow the crystals to dry in air. Crude acetaminophen product was weighed and set aside a small sample for a melting point determination and a color comparison after the next step. Calculation of the percentage yield of crude acetaminophen (MW = 151.2). was done and recorded in the lab notebook.
Acid-Base balance is the state of equilibrium between proton donors and proton acceptors in the buffering system of the blood that is maintained at approximately pH 7.35 to 7.45 under normal conditions in arterial blood. It is important to regulate chemical balance or homeostasis of body fluids. Acidity or alkalinity has to be regulated. An acid is a substance that lets out hydrogen ions in solution. Strong acid like hydrochloric acid release all or nearly all their hydrogen ions and weak acids like carbonic acid release some hydrogen ions.
Analysis of Aspirin Tablets Aim --- To discover the percentage of acetylsalicylic acid in a sample of aspirin tablets. ----------------------------------------------------------------- In order to do this, the amount of moles that react with the sodium hydroxide must be known. This is achieved by using the method of back titration.
Neutralization Experiment AIM:- To investigate how heat is given out in neutralizing sodium hydroxide (NaOH) using different concentrations of Hydrochloric Acid. Background Information:- Substances that neutralize acids are called alkalis. An acid is a substance that forms hydrogen ions (H+ ) when placed in water. It can also be described as a proton donor as it provides H+ ions. An example of an acid is hydrochloric acid (HCl), Sulphuric acid (H2SO4) etc.
The objective of this lab is to determine the present of normal and abnormal constituents in the urine, also to examine the pH, specific gravity, and chemical constituents.
In this experiment three different equations were used and they are the Stoichiometry of Titration Reaction, Converting mL to L, and Calculating the Molarity of NaOH and HCl (Lab Guide pg. 142 and 143).