3) 3the value of the slope obtained above in #2 yields the density of your unknown solid, in units of g/cm using this value, identify your unknown solid (see procedure, part c, #5) id code of unknown. A sample of an unknown liquid has a mass of 2317g, and a volume of 690 ml what is the density of this liquid. The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid and the liquid changes into a vapor 1733° f at 760 mm hg (ntp, 1992.
The density of unknown liquid, d l can be derived by substituted equation 1 into equation 2 thus, the density of unknown liquid could be by using the formula as shown below: a pycnometer (shown in fig 1) is a glass flask that has a close-fitting ground glass stopper with a capillary hole through it. Purpose: the purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then comparing the results to the values for known substances. Record the density of your unknown salt solution on the following line to the correct number of significant figures make sure to include the correct units. 2) pour unknown liquid #1 into the graduated cylinder to the 50 ml level 3) find the mass of the graduated cylinder with 50ml of unknown liquid #1 4) repeat steps 1-3 for unknown liquid #2.
• to determine the density of a known liquid (water) • to identify an unknown liquid by determining its density • to determine the density of a regular solid and an irregular solid. Substances (two unknown liquids and an unknown solid) by measuring the mass and volume of each substance as precisely and accurately as possible for liquids and solids the mass is usually expressed in grams (g) and the volume in milliliters (ml. Density of liquid sample for trial 1 the density of a liquid sample is the mass of the sample divided by its volume since the mass is known to 4 significant figures, but the volume is only known to 3 significant figures, the calculated density should only be expressed to 3 significant figures. A metal block when fully immersed in a liquid of density 4kg/litre loses 15 kg the same object when fully immersed in an unknown liquid loses 27kg. Problem example 1 ordinary commercial nitric acid is a liquid having a density of 142 g ml -1, and contains 698% hno 3 by weight a) calculate the mass of hno 3 in 800 ml of nitric acid.
An efficient lab procedure for determining densities of liquids with a discussion of some possible errors. The density of a liquid is far easier to measure than that of a solid or gas the volume of a solid can be difficult to obtain, while the mass of a gas can rarely be measured directly you can, however, measure the volume and mass of a liquid directly and, for most applications, simultaneously. The density of a liquid is usually reported in units of grams per milliliter (g/ml) the density of a solid is reported in units of grams per cubic centimeter (g/cm 3 . Some commonly used density measuring devices include hydrometers, aerometers, pycnometers, density kits and digital density meters the density of an object can be manually computed by dividing its mass by its volume, which is mathematically represented by the formula d = m/v, where d denotes density, m indicates the mass and v is the volume of the object.
B) volume of liquid=_____ c) density of liquid #1 =____ liquid #2: given: mass of empty graduated cylinder = 78 grams mass of graduated cylinder with unknown liquid #2= 1175 grams find: a) mass of just the liquid = ____ b) volume of liquid =_____ c) density of liquid #2=____ check your answers by inserting the value in the box below. Density is defined as the mass per unit volume of a substance, and it is a physical property of matter a physical property can be measured without changing the chemical identity of the substance. Density of liquids and solids density of liquids and solids by lab instructor: due date: results and discussion: the purpose of the experiment was to determine the densities of the unknown liquid and solid as precisely and accurately as possible in order to identify them. Part d: density of unknown liquid (1) using the top load balance, (0001 g) and a 10 ml pipet, dry flask, calculate the density of an unknown liquid use the same procedures as you followed in part c, but add these modifications.
V determination of liquid density by mass and volume measurement 1 determine the mass of your graduated cylinder while dry and then fill about half full with the unknown liquid supplied. I have a problem from the 2002 ap exam the questions specifically are from 3b, c, and d ( see the attached image) 2 relevant equations so i'm trying to solve for the unknown density of the liquid (pw) from what i can assume so far, the object is submerged in the liquid, dispersing a volume of. Density is the amount of matter in an object compared to its volume (the amount of space it takes up) if an object were extremely dense, it would feel heavier than another object of the same size that was less dense. Best answer: find the weight of the water by itself the density of water is approx 1g/ml so the weight is also the volume of the flask find the weight of the unknown liquid and divide that by the volume.