Gracen Seiler April 7th, 2015 Section- 109 Investigating Stoichiometry with Sodium Salts of Carbonic Acid Introduction- This experiment is intended to help find a better understanding of chemical stoichiometry through titrations of NaHCO3 and NA2CO3 with HCl. A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form in a nuclear reaction. Titration is when a measured amount of solution of unknown volume is added to a known volume of a second solution until the reaction between them is complete. The objective of this experiment is reacting sodium bicarbonate (NaHCO3) and sodium carbonate (NaCO3) with hydrochloric acid (HCl) to produce sodium chloride (NaCl), water (H20) and carbon dioxide (CO2). -Use the titrations of the following chemical reactions: NaHCO3 + HCl (aq) NaCl (aq) + H2O (l) + CO2 (g) 2HCl (aq) + Na2CO3 (s) 2NaCl (aq) + H2O (l) + CO2 (g) Experimental procedure- Two Erlenmeyer flask must be labeled “unknown 1 and unknown 2”.
Chemistry Lab – Precipitate Patterns Purpose: To identify which anion will be used to form a precipitate with the most metal cations. Procedure: All materials were obtained A chart was made to compare anions and cations Drops of sodium carbonate solution were placed in each section of the wet plate Dilute solutions of calcium carbonate were dropped into the sodium carbonate and observations were recorded Step 4 was repeated for all other reacting solutions and observations were recorded Chemicals were placed into a waste beaker and disposed of Lab station was cleaned Observation List: Na2CO3 + Ca(NO3)2 CaCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Cu(NO3)2 CuCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Fe(NO3)2 FeCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Mg(NO3)2 MgCO3 + NaNO3 -Formation of a precipitate Na2CO3 + Zn(NO3)2 ZnCO3 + NaNO3 -Formation of a precipitate Na2CO3 + NaSO4 Na2CO3 + Na2SO4 -Formation of a precipitate Na2SO4 +Cu(NO3)2 CuSO4 + NaNO3 -Formation of a precipitate Na2SO4 + Ca(NO3)2 CaSO4 + NaNO3 -Formation of a precipitate Analyse and Evaluate: The investigation could have been improved of beakers were used instead of wet plates. This way, it would have been easier to see the reactions taking place. The anion that could be used to precipitate the most metals cations was carbonate. Carbonate could be used to remove silver ions.
Use a new glucose strip and record Data: Conclusion: According to my data, pH levels do, in fact, affect the results of Lactex. I say this because in my experiment, pre-enzyme, my solutions were all negative except for the soda. I used the test strips to determine if they were negative or positive solutions. After I put in the enzyme, Lactex, my results changed. Vinegar, Antacid, and Soap all became positive solutions after I put in the enzyme.
Abstract The purpose of the experiment was to identify unknown ionic compound #. After many tests, the unknown was identified as sodium chloride. The cation (Na+) was determined by having a yellow/orange color flame test. The anion (Cl-) was determined by the chloride anion test when the unknown test solution showed a positive test for chloride. The synthesis of NaCl further identified the ionic compound by reacting sodium hydroxide and hydrochloric acid and obtaining solid sodium chloride.
(d) What evidence suggests that nitrate compounds are soluble in water? (e) Write the chemical formula for each precipitate that formed. Apply and Extend (f) Write a balanced chemical equation for each precipitation reaction that occurred. (g) Why is it necessary to use distilled water to prepare the solutions used in this investigation? (h) "Hard" water contains a high concentration of calcium ions.
Sodium Fluoride in Drinking Water? With the amount of toxins in our lakes and oceans, it is only natural that we somehow purify the chemicals in our sources of water so that we can have the alternative way to not suffer from dehydration. Water is a fundamental part of our lives; in fact the average adult body is 55-75% water. Aside from all this water regulates body temperature and blood circulation, carries nutrients and oxygen to cells. Dr. Fereydoon Batmanghelidj made it clear that chronic dehydration could cause certain problems for the body, including hypertension, asthma, allergies, and migraine headaches.
The results from this test were negative. The last test I performed was a Malonate Utilization Test. The purpose is to see if the microbe can use the compound malonate as its sole source of carbon and energy for growth. The lab results indicated a positive reaction. Procedure: Conduct Bacterial Growth Test: 1.
Effect of ammonium nitrate on Ceratopteris richardii Abstract: Ceratopteris richardii, also known as C-fern, is commonly used in research studies as a model plant because of its short generation time. In this experiment, we aimed to observe the effects of ammonium nitrate on this species of ferns. To achieve this, we inoculated and evenly spread three drops of C. richardii spores into two separate and sterile petri dishes, one control group and one experimental group. The experimental treatment contained 1% ammonium nitrate on the medium and the control treatment was merely a normal nutrient-rich agar. Then, we performed an f-test and a t-test to determine if there was any germination difference between the treatments.
6/28/2012 The 1st lab procedure performed was the gram stain. Previously, before starting the gram stain I prepared a bacterial smear on a glass slide and used the heat fixing method which was done to help the bacteria cells adhere to the glass, kill them, and also helps make the cells easier to stain by coagulating the cells proteins. The gram stain test helped me identify rather my bacterium would be a negative or positive and determined the microscopic morphology (shape, and arrangement) of my bacterium as well. The test
The digestion and absorption of the nutrients we consume draw the negative materials from the body. The body’s temperature stays at the same level and its acid-base balance will be healthy. When not enough water is consumed, major health problems may arise, such as: Headaches, forgetfulness, inability to concentrate: Ninety percent of the brain is water. For this reason dehydration’s first symptoms appear in brain function. It isn’t necessary to take medicine for every headache that develops: Drinking water is often the cure.