amounts of gastric acids. One of the abundant acids is Hydrochloric Acid (HCl); this acid has a pH level of 1. When there is too much acid in our stomach‚ it rises up to the esophagus‚ which causes the burning sensation known as heartburn. You can treat this if you take antacids‚ antacids are mild bases that can help neutralize the stomach and ends heartburn. GENERAL NEUTRALIZATION EQUATION: Acid + Base = H2O + NaCl HCl + NaOH = water + salt Purpose The purpose of this experiment was to
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of oxalic acid (g) 3.162g Concentration of 100.00ml .2510M Table 2: NaOH Mass of NaOH + weigh boat 11.336g Mass of weigh boat .500g Calculated mass of NaOH 10.836g Moles of NaOH .2709mol Concentration of 500.0ml NaOH .5418M Table 3: HCl Volume of Concentrated HCl 10.00mL Concentration diluted to 250.00ml .5475M Table 2: Volume of NaOH needed to neutralize 10.00 mL of oxalic acid Trial 1 Trial 2 Initial reading of buret (mL) 16.39mL 9.89mL Final reading of buret (mL) 25.98mL 19.50mL Volume of
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for three reactions: Reaction 1 Reaction Equation NaOH(s) → Na+(aq) + OH-(aq) Solid NaOH is dissolved in water 2 Na+(aq) + OH-(aq) + H+(aq) + Cl-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Solutions of NaOH and HCl are mixed 3 NaOH(s) + H+(aq) + Cl-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Solid NaOH is dissolved in a HCl solution The third reaction is actually a combination of the first two reactions. Notice that the equation for Reaction 3 can be obtained by adding together reactions 1 & 2. By calculating the heats
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to obtain 50 mL of 0.862M HCl. It was added to the empty coffee cup calorimeter‚ and its initial temperature was obtained by using the MeasureNet. Using a graduated cylinder‚ 50 mL of 0.901M NaOH was added into the cup‚ and the final temperature was obtained. The solution was disposed‚ and the coffee cup calorimeter was rinsed with distilled water. The next experiments were performed. The acid was always added before the base. Experiment 2 consisted of 100 mL of 0.862M HCl and 100 mL of 0.901M NaOH
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the acid in the solution are equal to the moles of the base (Survey of Chemistry lab manual). Using a dilution equation of M1xV1=M2xV2‚ the concentration of the hydrochloric acid can be calculated. M1=NaOH(molarity)‚ V1=NaOH(volume)‚ M2=HCl(molarity)‚ V2=HCl(volume). Procedure: Instructions for laboratory were found on page 91 of Survey of Chemistry lab manual. All calculations were rounded off by 2 decimal places for accuracy. Preparation of the indicator required a combination of 50 grams
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of % Composition of Pennies Using Redox and Double Displacement (Precipitation) Reactions Introduction: Oxidation involves the gain of electrons of hydrogen or the loss of oxygen or decrease in oxidation state. If zinc completely reacts with HCL‚ then the theoretical yield of copper should be equivalent to the actual yield. Purpose: In this lab‚ we will determine the percent composition of a modern (post-1982) penny by using a strong acid to react and dissolve the zinc core‚ leaving only
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organic layer contains the dichloromethane‚ aspirin‚ and the unknown. If the HCl has nothing to react with in the aqueous layer following mixing (i.e.‚ sodium acetylsalicylate)‚ then little to no solid aspirin will be produced. Furthermore‚ more unknown would be produced than expected because aspirin would precipitate with the unknown during distillation. (c) Mistakenly extracting the dichloromethane solution with 5% HCl rather than 5% NaHCO3 would make the solution impure. It would likely not form
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POSITIONING 8 MARKETING MIX 8 Product 8 Price 10 Pricing and Profit Margins 10 Place 11 Promotion 13 Marketing Budget 13 REVIEW AND CONTROL 14 MARKETING ORGANIZATION 14 CONTINGENCY PLAN 14 BIBLIOGRAPHY 15 EXECUTIVE SUMMARY HCL‚ a 35 year old enterprise‚ founded in 1976‚ is one of India ’s original IT garage start-ups. Its range of offerings span R&D and Technology Services‚ Enterprise and Applications Consulting‚ Remote Infrastructure Management‚ BPO services‚ IT Hardware
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moles Moles of HCl in 10ml of 6.0M = 6/1 x 0.01L = 0.06 moles Actual Mole Ratio (AMR) = 0.21/0.06 = 3.5 Equation mole Ratio (EMR) = 1/2 = 0.5 If AMR > EMR then the 2nd reactant‚ i.e. HCl is the limiting reactant and Magnesium is in excess. Hypothesis: Hydrochloric acid will be the limiting react at stages 5 and 6 and Magnesium will be the limiting reactant at stage 7. Procedure: We were given two magnesium ribbons and a beaker of 6M HCl to carry out our
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1: EMPLOYEE ACKNOWLEDGEMENT FORM I understand that this HR Manual provides vital information about Hindustan Composites Limited (HCL). If any of my queries are unanswered by this manual‚ I will consult the HR department for the same. It is rightly said that ’Nothing is constant except change.’ As the information‚ policies and benefits described here are subject to changes‚ I acknowledge that revisions to the handbook may occur over a period of time. I understand that revised information may
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