Calibration of Volumetric Glassware Nur Farah Nabilah Binti Ahmed Zhaini Muhammad Imanuddin Bin Azman Maisarah Binti Alias Summary In this experiment‚ The purpose of this experiment is to investigate the measurement of the actual volume contents of volumetric glassware. In the beginning of the experiment‚ the volumetric glassware should be clean and dry before used. The volumetric glassware‚ measuring cylinder and pipette should be handled with care and all the precautions
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Introduction Vinegar Tom was written by Caryl Churchill‚ a feminist‚ in 1976 but set in the 17th Century. The play was inspired by the women’s rights act of 1970‚ and the discrimination of women. The title comes from the name of a horrible creature which is supposed to be a witch’s familiar. It is about how four naïve and innocent women’s lives are affected throughout the Salem witch-hunts. Modernised song‚ dance and rhythm are used to combine the horror of the past and attitudes which have carried
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E XPE RIME NT 4 . 5 Reactions of acids Aim To investigate and compare some reactions of a strong acid‚ hydrochloric acid‚ and a weak acid‚ ethanoic acid (common name‚ acetic acid) Equipment Dropper bottles containing: • 0.1 M hydrochloric acid‚ HCl • 0.1 M ethanoic acid (acetic acid)‚ CH3COOH • 0.1 M sodium hydroxide‚ NaOH • 1 M hydrochloric acid‚ HCl • 1 M ethanoic acid (acetic acid)‚ CH3COOH • universal indicator solution • limewater (calcium hydroxide‚ Ca(OH)2) Marble chips (calcium carbonate
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Who’s been cheating on the vinegar? Aim: To investigate if the vinegars have been diluted by working out their concentrations. Scientific Background: Vinegar is an acid and there fore can be neutralised by an alkali. Acid + Alkali à salt + water Hydrochloric acid + Sodium Hydroxide à Sodium chloride + water Vinegar is a weak acid and therefore it only partially ionises in solution. CH3COOH ßà CH3COO- + H+ An alkali such as Sodium Hydroxide has a formula NaOH. If the alkali
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Chapter 5‚ 6 Review 1. You invested $1‚650 in an account that pays 5 percent simple interest. How much more could you have earned over a 20-year period if the interest had compounded annually? A. $849.22 B. $930.11 C. $982.19 D. $1‚021.15 E. $1‚077.94 2. Today‚ you earn a salary of $36‚000. What will be your annual salary twelve years from now if you earn annual raises of 3.6 percent? A. $55‚032.54 B. $57‚414.06 C. $58‚235.24 D. $59‚122.08 E. $59‚360.45 3. You hope to buy your dream
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P2 2. Judy Johnson is choosing between investing in two Treasury securities that mature in five years and have par values of $1‚000. One is a Treasury note paying an annual coupon of 5.06 percent. The other is a TIPS which pays 3 percent interest annually. a. If inflation remains constant at 2 percent annually over the next five years‚ what will be Judy’s annual interest income from the TIPS bond? From the Treasury note? b. How much interest will Judy receive over the five years from the
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The basic As/Sold As Matrix" (400‚000 x 400‚000). Obviously‚ idea of the relative sales value scheme is that all sales the possible combinations are endless‚ so how does one should show gross margin percent equal to the average choose a "best" approach? The "best" solution is to gross margin percent across the full joint product set. start with demand for the highest value product (405) This average is 19% [(246 - 200) (246)]. This does and work back unsold production to the next lowest imply
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typically used for pain relief and neutralizing stomach acid to alleviate indigestion. Alka-Seltzer tablets contain Aspirin‚ Citric Acid (CH3COOH)‚ and Sodium Bicarbonate (NaCO3). When the tablet is placed in water it undergoes an acid-base reaction and Carbon Dioxide (CO2) is a byproduct that causes the notorious “Fizz”. The objective of the lab was to measure the % of NaCO3 in an Alka-Seltzer tablet in different measures of an acidic solution (Vinegar). Through understanding of stoichiometric relationships
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17 g Determine the percent yield of NaCl in your experiment‚ showing all work neatly in the space below. (5 points) 7.17 g / 8.8197 g = 0.81295 = 81% If you had not heated the product long enough to remove all of the water‚ explain in detail how that would have specifically affected your calculated actual yield and percent yield. (5 points) The product’s mass would be greater making the calculations adjust. If my actual yield is greater‚ then so would my percent yield.
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analyze data and draw a conclusion. In this experiment I will find out that in a type of water the Alka-Seltzer will dissolve faster and slower. Alka-Seltzer is one of the world’s best known antacids. Its main function is to absorb excess stomach acid. II. MATERIALS: * Tap Water - Warm Water * Cold Water - Salt Water * Acidic Water -5 cups (250 mL of water in each cup) * A whole Alka-Seltzer tablet III. HYPOTHESIS: My hypothesis is that the Alka-Seltzer tablet
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