Oxygen content of air Objective: To measure the percent of oxygen in air and the percent of oxygen in an exhale of a breath Hypothesis: Air has more oxygen content in it rather than the exhale of a human breath. Procedure: Wash hands to remove oils Obtain 2 samples of steel wool (. 7 g each) Expose one sample of the wool to 35 mL of vinegar solution for 1 minute Remove the wool from the solution and shake it to remove the vinegar Place the steel wool in a syringe. Put the plunger in the syringe at the 28 mL mark Place the syringe a 250 mL beaker that is slightly filled with water Pull the plunger until the water reaches the 0 mL mark Record observations every three minutes of the water level Fill a balloon with the exhale from breath Put 100 mL of water in the balloon and shake for 5 minutes Place the other sample of steel wool in another 35 mL vinegar solution for one minute and clean it Put the steel wool in another syringe and then release the air from the balloon into the syringe Repeat steps 6 – 9 with this syringe. Data and observations: (THE GRAPH WILL GO HERE! ! ! ! ! ) Conclusion: The oxygen combined with the steel wool in both syringes.
This is apparent because rust was formed on both samples. The water came up to the 5. 5 mL mark on the syringe with the air in it, while the syringe with the breath only reached 4. 5 mL.
Therefore, concluding that the oxygen content of air is higher than the oxygen content in a human breath. Albertson’s Brand Condensed Chicken Noodle Soup has many different ingredients within the steel container. These ingredients are as follows: Water, enriched egg noodles (enriched wheat flour [niacin, ferrous sulfate, thiamine mono nitrate, riboflavin, folic acid], eggs) chicken, salt, modified corn starch, chicken fat, dextrose, soybean oil, mono sodium glutamate, soy protein isolate, natural flavoring, garlic powder, beta carbonate, sodium phosphate, paprika, and onion concentrate. Thiamine mono nitrate, also known as Vitamin B, is a white crystalline powder. It has a positive reaction. The Chemical formula is C 12 H 17 N 5 O 4 S.
The Essay on Determination of Dissolved Oxygen In a Water
INTRODUCTION In an alkaline solution, dissolved oxygen will oxidize manganese(II) to the trivalent state. 8OH-(aq) + 4Mn2+(aq) + 2H2O(l) －－＞ 4Mn(OH)3(s) The analysis is completed by titrating the iodine produced from potassium iodide by manganese(III) hydroxide. 2Mn(OH)3(s) + 2I-(aq) + 6 H+(aq) －－＞ 2Mn2+(aq) + I2(aq) + 6H2O(l) Sodium thiosulphate is used as the titrant. Success of the method is ...
“Thiamine Mono nitrate is stable for at least 36 months when stored in the unopened container. It is stable in acid solutions at a pH less than 4. 0 but deteriorates rapidly in neutral or alkaline solutions, especially when exposed to air. Moisture and contact with metal accelerates oxidation and reduction.” (Gershoff) Another mixture within this soup is called mono sodium glutamate, or MSG for short.
“Mono sodium Glutamate is used as a flavor enhancer in a variety of foods. Originally developed by the Japanese, MSG was first made by using a seaweed broth to obtain the flavor-enhancing effects of MSG. Today MSG is made by a fermenting process using starch, sugar beets, sugar cane, or molasses.” (Gershoff) The rest about this substance is just about the taste of salt. It has many properties of salt.
Gershoff, Stanley The Tufts University Guide to Total Nutrition Harper Perennial, New York, copyright 1996.
