The SI base unit of mass and volume are kilograms and cubic meters, respectively, but chemists generally express mass in grams and volume in cubic centimetres or millilitres. After finish this part. , 250C = 0,9961 g/ml. Discussion: I don't believe that I had any substantial errors, But I did spill some of my substance on my hand while I was pouring it back into it's container. 2 g/cm3 to 20 g/cm3. In this experiment we will learn how can we find the density of liquids and liquids of density how change effect of temperature, pressure, mass, volume and concentration. Percent Error: ( |0,9964- 0,9975| / 0,9964)*100= 0,11% b) Density of solutions: Volume of solution: 20 ml 4% concentration =((50,91-29,95)/ 20)= 1,048 g/ml 8% concentration =((51,18-29,95)/20)= 1,0615 g/ml 12% concentration =((51,47-29,95)/20)= 1,076 g/ml 16% concentration =((51,95-29,95)/20)= 1,10 g/ml Unknown concentration (U1): U1 ((50,60-29,95)/20)= 1,0325 g/ml. Therefore, I should be even closer to the actual density. For the water, I took the average of the density of water at 19 °C and 20 °C to find its density at 19.5 °C, but that may be incorrect if the density follows a curve. download word file, 3 pages5.0 Get Your Custom Essay 1) Solid molecules Liquid molecules Gas molecules 2. Was calculated. , mass per unit volume). Lab Report: determine the molar mass of an unknown gas, from the gas density... liquid, very rapidly. Viscosity: This substance seems to have a moderately high viscosity. There are significant overlaps, however. For calcium, the gas produced in a test tube by the downward displacement ... ... conversion of hydrogen peroxide (H2O2) into water and oxygen gas. Graduated cylinder Distilled water Thermometer NaCI solutions with different concentrations (4, 8, 12, 16% NaCI by weight. ” if you answer that they weigh the same, you demonstrate a clear understanding of the meaning of mass- a measure of quantity of matter. On the other hand, temperature decreases volume will decrease for this reason density of liquids increase when temperature decreases. My precision was 1.6632 ppt, which is well under 4 ppt which is typically required. Mass of water + graduated cylinder: 49,90 g Mass of water: 19,95g Density= (19,95)/ 20= 0,9975 g/ml Formula of Percent Error: | T. V. E. V. | _____________ *(100) |T. It seems that I was lucky to have gotten such good accuracy with bad precision. The density of water at 40C is 1000g/1000 ml=1. 000 kg. RESULTS (DATA): a) Density of water; Temperature of water: 24 0C Mass of graduated cylinder (m1 ) : 29,95 g Volume of water: 20 ml. https://phdessay.com/density-of-liquids-lab-report-paper/. The Erlenmyer flask was then filled with about 30 mL of deionized water dispensed from a buret. In order to find the density of water, one must know its mass and volume first. If we use very big pressure. My results showed that density is really equal to a substance’s mass divided by its volume. The equation for the water was (0.9861 g/mL + 0.9958 g/mL + 0.9650 g/mL) / 3 = 0.9823 g/mL. (2001, November 27). In general, solids are denser than liquids and both are than gases. , 230C = 0,9966 g/ml. The Substance coats the sides of the graduated cylinder very well. In order to find the volume of the water, I took note of the starting point of the water in the buret, then took note of the ending point of the water after about 30 mL were into the flask. 1 Background of the Experiment Anyone who answers that the bricks weigh more than the feathers has confused the concepts of mass and density. A few drops of the liquid inside seemed to drip out from right above the bottom where it was supposed to come out. Effect Of Pressure: density of liquids cannot change with pressure. Don't use plagiarized sources. Matter in a bricks is more concentrated than in a feather – that is, the matter in brick is confined to a smaller volume. , 210C = 0,9970 g/ml. Hypothesis: I think that the unknown liquid number 100 is "Glycerol". We use cookies to give you the best experience possible. Part A5c: ... ... density of each solid. Also, I may have gotten finger prints on the flask, which would have added a slight bit of extra weight that could throw my calculations off. On the other hand, If we had taken 30 ml water instead of 20 ml of water. Because according to the increase in volume, mass would increase too. Data for determination of the density of an unknown liquid: Actual density of 2-propanol (at 20 °C): 0.786 g/mL. 5 g/ml to 3-4 g/ml. ADAM CAP is an elastic waistband enthusiast, hammock admirer, and rare dingus collector hailing from Berwyn, Pennsylvania. Density is the ratio of mass to volume. The Density Of An Unknown Liquid. Density is a function of temperature because volume varies with temperature whereas mass remains constant. HSC year 12 syllabus, Formal Lab Report Rates of Reaction Alkali Metals and Alkaline Earth Metals. To find the water’s mass, we first weighed an empty Erlenmyer flask and rubber stopper. c) Of course No, if we have gas sample. In order to find the density, I simply divided the mass found by the volume found. Look down the tube as you pour water ... "Good news: you can turn to other's writing help. experiment lab report determining the densities of liquids and solids objective: the objective of experiment was to find the density of an unknown liquid and an DISCUSSION: In this Experiment, We were learned how can we find the density of the liquids, by using the formula. Because molecular blanks increases so that Density of liquids decrease when temperature increases. The substance didn't really have a smell to it. My main interests at this time include reading, walking, and learning how to do everything faster. The temperature of the water was made note. My accuracy was very high, but my precision was not quite as good. This will give us an approximate density for SF6 of .00858. Remember. WriteWork contributors, "The Density Of An Unknown Liquid," WriteWork.com, https://www.writework.com/essay/density-unknown-liquid (accessed November 03, 2020). Also, densities of elements and compounds are known more precisely than densities of materials with variable compositions (such as wood or robber). I also believe that the unknown substance will have a moderately high viscosity because it is very thick and coats the walls of it's container. In the end, my data was fairly accurate with the actual data, so the experment was a success. November 2001, download word file, 3 pages 1. A greater mass of solid will result in a greater volume. At 20 0 C, the density of water is 0. Don’t miss a chance to chat with experts. For example, the precision for the water was found by this equation: |(0.9958 g/mL – 0.9650 g/mL)| / 0.9823 g/mL x 1000. In order to find the mass of the water and unknown, a simple subtraction problem was used. The density of the water that we had known its mass and volume. Web. ... Alkaline Earth metal. When we placed the heated can full of steam in the cold water bath, the can imploded trying to condense the whole structure into water ... it to our graph to find a density, then multiply that density by three. Here is an old riddle:” What weighs more, a ton of bricks or a ton of feathers? A sample equation would be 76.9994 g – 46.9959 g = 30.0035 g. This same method was used to find the volume of water in the flask. WriteWork contributors. custom paper from our expert writers, Density of Liquids Lab Report Paper. By continuing we’ll assume you’re on board with our cookie policy, Your Deadline is Too Short? Any pure substance has a specific density at a specific temperature. b) Because there are very small blanks between molecules so that we need a great pressure to change density of liquids. WriteWork has over 100,000 sample papers", "I turned what i thought was a C+ paper into an A-". We can use pressure to change density Because gas molecules have very big blanks one to another and we can change density very easily. Laboratory Techniques Lab Report Title: Density Measurements Virtual Lab Objective(s): Determine the densities of an unknown solid and liquid using different methods of measurement to determine if the solid will float on water. An enzyme known as catalase ... ... and the independent variable which was the temperature the reaction ... ... and adding it to the Ni2+ metallic ion. We were started second part. REFERENCES: General chemistry, page 15-16, Ralph PETRUCCI & William HARWOOD. Introduction Density: Density is a physical property obtained by dividing the mass of a material or object by its volume (i. e. , mass per unit volume). PROCEDURE: The mass of the empty graduated cylinder was measured and the mass was written. To find the average density, I added the three densities I found, then divided that total by three to find the average. Finally Density of the unknown solution was calculated. My accuracy was also high, as my error was only 0.0044 g/mL. B. Density of an Unknown Liquid Here, the only experimental step is to fill the pychnometer completely with the unknown liquid, then weigh it.
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