Determining the Enthalpy Change for a Redox Reaction Criteria Assessed: Background Design Research Question What is the enthalpy change between the reaction of Zinc reducing Copper II ions? Purpose Determine the change in enthalpy for the redox reduction of zinc reducing Copper II ions. Independent Variable Dependent Variable The change in temperature Controlled Variables Materials/ Apparatus * Zinc powder * 2‚ Foam cups * 10 cm3 pipette * stopwatch * 1.00 M Copper
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Titration Lab How Much Citric Acid is in Your Soda? PURPOSE To determine the molarity (concentration) of citric acid (H3C6H5O7) in various different citrus flavored sodas. BACKGROUND PRINCIPLES Popular sodas all strive for a somewhat sour (’tart’) flavor and manufacturers utilize acids to impart this taste. While there are a vast variety of different brands of sodas on the market‚ they can be broken into two main categories: dark or clear. This differentiation is not only a simple color
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involve the reaction of an acid and a base to produce a salt (ionic compound) and water. Acid + Base ( Salt + Water □ In this lab‚ sulfamic acid (a weak acid which contains one acidic hydrogen) will be used: H2NSO2OH(aq) + NaOH(aq) ( NaOSO2NH2(aq) + H2O(l) (Net Equation: H+(aq) + OH-(aq) ( H2O(l)) □ Titration is a process of neutralization □ Titration is commonly used to determine the concentration of an acid or base in a solution.
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What is it? Folic acid is a water soluble B vitamin. It is used during pregnancy to prevent Neural Tube Defects (NTD’s). NTD’s are birth defects of the brain‚ spine or spinal cord (MedlinePlus). They can be fatal depending on how bad the injury is especially if it is to the brain. Folic acid works with vitamin B12 in the formation of red blood cells. Deficiency in both folic acid and vitamin B12 causes a certain type of anemia known as macrocytic anemia. Macrocytic anemia is a type of anemia that
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Pre writing November 2009‚ a moment in my life will never be forgotten. My day started off as it usually would. Started my morning off with a nice warm shower‚ brushed my teeth and picked out my outfit for the day. That weekend I was so excited to travel to the Bronx New York to spend time with family and friends. My best friend picked me up from my mom’s house and then down to the gas station as I’m pumping the gas I see my best friend walking towards the car with serious face. As he approached
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Benzoic Acid and Benzoates in Food‚ Drinks and Medicines Benzoic acid and benzoates are common additives to food‚ drinks‚ medicines and cosmetics‚ and they also occur naturally in many plants. They are useful chemicals in manufactured products because they kill or inhibit both bacteria and fungi and can act as preservatives. Benzoic acid and benzoates are considered to be safe chemicals for humans when they’re used in small quantities‚ but there are at least two situations in which even small
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chain length of ethers increases‚ solubility in water decreases. Branching of the alkyl chain results in greater solubility since London forces are weaker. O 111o H3C CH3 The C-O bonds in ethers are polar‚ with O being - and each of the C atoms bearing a +. The C-O-C bond angle is 111o‚ slightly higher than the H-O-H bond angle in water because of the stronger electron repulsion between the bulky alkyl groups. Preparation of Ethers: 1. Preparation of symmetrical
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data recorded. This was concluded to be 0.25 M–most similar to Solution #1. Concentration‚ measured in molarity (M)‚ can be calculated using the equation: M = mol L. The absorbance measures the amount of light that passes through the solutions‚ determining the amount of solute dissolved within the solution. The experimentation results are the following: Solution #1 has a concentration of 0.25 M and absorbance of 1.963‚ Solution #2 has a concentration of 0.15 M and absorbance of 1.203‚ Solution #3
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According to Benjamin Franklin‚ ‘’ Leisure is the time for doing something useful; this leisure the diligent man will obtain‚ the lazy man never. ‘’ Scientists prove by given statistics that in America‚ people who do an activity‚ leisure and sports‚ everyday is 96.2%‚ and they spend an average of 5.18 hours per day. Leisure‚ or free time‚ is time spent away from obligations and work. Leisure‚ nowadays‚ becomes very actual and trendy‚ with gender equalities and with the modern world of today‚ it becomes
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Lab Report 1708 Mrs. Himler Ryan Nelson 9/20/2024. Lab Report INTRODUCTION: During this lab‚ the group used 3 food thickeners. These thickeners are used to thicken‚ stabilize‚ and prevent separation for our daily products such as ranch‚ ice cream‚ and other dairy products. The group used modified food starch‚ corn starch‚ and guar gum. They all are different from each other‚ each in a unique way. Firstly‚ guar gum is like pectin‚ a soluble fiber and polysaccharide. Furthermore‚ the body cannot digest
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