Calculate the density of the water by dividing the weight of the water (mass) by its volume and record this value in the data table provided. Experiment 7: DENSITY OF A MARBLE BY WATER DISPLACEMENT * You need: Graduated cylinder, electric scales, marble and water. 1. Fill a graduated cylinder with exactly 50ml of water (this is your initial reading). 2.
1. 15.8 g of KCl is dissolved in 225 mL of water. Calculate the molarity. 2. Calculate the mass of KCl required to prepare 250. mL of 0.250 M solution.
Mix. k. Measure out 3/4 cup of the solution from cup 3 and add it to cup 4. Mix. l. What are the relative salt concentrations of cups 1–4? Example: Cup 2 is made up of half stock solution and half tap water, which is a 50 percent relative salt concentration.
Record all the mass measurements for Penny Set B. 3.) Using a 100-mL graduated cylinder and the water displacement technique, measure the volume of 1 penny from Penny Set A (Pre-1982). Then, find the volume of 2, 3, 5, 7, 9, and 13 pennies. Record all volume measurements for Penny Set A.
Nest two Styrofoam cups within one another 2. Turn on magnetic stirrer 3. Insert probe into cardboard lid 4. Pour 25mL of water into calorimeter 5. Determine initial temperature of water 6.
Part B: The graduated pipet’s average density at 22.3 °C was determined to be 0.9785g/mL with a percentage error of 1.89% shows the graduated pipet to be more accurate and precise. Part C: Density of an unknown NaCl solution was measured and a calibration curve used to determine the percentage of NaCl by mass in the solution. y=0.007x + 0.998 which concluded that the concentration of the sodium chloride solution was 3.14%. INTRODUCTION Anything that you can see, touch, taste or smell, occupies space and has mass, it is called matter. Matter can be a gas, a liquid,
| Centrifuge: used to isolate the solid from the solution | . Focus Questions: When acidified water is not used in the zinc and iodine synthesis, zinc hydroxide is formed. How can it be identified based on the amphoteric nature. When zinc and iodine react without the presence of acetic acid in the water, zinc hydroxide forms. This is evident because the substance tested positive for both the acid test and the base test for zinc hydroxide.
Cylinder was rinsed with distilled water. * * 2. 2.0 ppm standard: 2.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 2. Cylinder was rinsed with distilled water. * 3.
What kind of research method you will use depends on what kind of report you are writing, if you will dig deep into the research or if you will do more of a basic research. Qualitative research is a method that is focuses on the “why” and “how” of the report, while the quantitative method focuses more on the numerical part of things and answers questions such as “How much?”, “ How many?” and How often?”. The main differences are qualitative research were created in the human and psychological sciences and has a lot to do with theories based on hermeneutics, phenomenology, and sociology. It focuses more on words and how people feel about certain situations. These have to do with human interpretation and personal experience you can collect this information through interviews.
Ammara Abid 9/10/14 Chem 106 A Library for Chemists Observations: * The hydrochloric acid and rubbing alcohol look almost exactly identical. If the labels weren’t on it I wouldn’t know what they were. * The mineral oil looks slightly thicker than the alcohol * The zinc shot has a small tiny teardrop shape * Zinc shot: grey color- less shiny than the granular * Zinc powder: has the consistency of flour except it is grey * Zinc Mossy: Big ½ inch pieces of zinc that resembles the zinc shot in color and texture but they are not teardrop shaped * Solid iodine: small circular pieces- black with a dark purple sheen * The solid iodine has an unpleasant smell that resembles bleach Solubility Test: