Lab: Soil Porosity And Permeability

7.The air dried filter paper was then placed on the weighing scale and results were recorded

c) Record the amount of substance that dissolved – all, some, a little, or none.

1. Fill the graduated cylinder nearly to the top with water, with a tall glass tube open at both ends (the water level with act as the closed end).

For the second part of the experiment I cut the cheesecloth into four pieces and folded them so that it was four layers thick. I placed one piece of cheesecloth into the funnel and measured 60mL of soil using the 100mL to help measure the soil and poured that into the funnel. Taking beaker number one I poured the contents into the funnel and let that filter into beaker number five. I used the same technique as above and I repeated the same thing to beakers number two through four and poured them into beakers number six through eight. Once this was done I observed beakers five through eight and wrote down my observations in Table 1.

Measure 500ml of tap water in the 500cm3 beaker, then measure 5g of sodium hydrogen carbonate using the 50cm3 beaker and weight scale and place in the beaker of water, using the glass rod to dissolve it into the mixture.

Next prepare the third test tube with an accurate measurement of 5ml sodium carbonate once again labelling appropriately.

Measure and add 5cm3 of buffer solution using a measuring cylinder with the pH 3 into a test tube using a pipette and place the potato cylinders into the test tube.

Pour approximately 50 mL of room-temperature distilled water into the glass beaker by using the estimated volume on the beaker.

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

XII. Take the 250 ml beaker to your lab bench. Set up a gravity filtration with a plastic funnel, folded wet filter paper, and an Erlenmeyer flask. Pour the content in the 250 ml beaker slowly through the filter paper. Wash the filter paper with deionized water. Dispose of the filtrate in the proper labeled waste container.

b. Place crushed ice in the beaker so the water level is just below the top of the

Submerge the graduated cylinder in the plastic tub so that it is completely filled with water. Hold the open end of the graduated cylinder and move it vertically upside-down where the open end of the graduated cylinder is still submerged in the plastic tub. Clamp the graduated cylinder the ring stand of the lab table to keep it in place. perforate a hole in the top of the rubber cork for the solution container. Cut a straw the length of about four inches. place the straw inside of the rubber cork hole. Set up your timer for two minutes.

4. Prepare a vacuum filtration apparatus using a buchner funnel. Obtain one filter paper for each one of your samples, weigh them and record their mass in your notebook (label them with a pencil to be able to differentiate them later).

Analysis of representative soil samples will also be undertaken to characterise different soil material, for example, pH, particle size, organic matter, potential contaminants and so on.

Soil compaction is one of the most important aspects behind many projects as it is the base of almost all structures and without a strong base failure will occur. It is known that most engineering properties improve as the density of the soil increases; also the greatest density for a given soil will occur at the optimum moisture content. This is the reason why accurate Proctor Tests are so important. Without them it would be impossible to know whether the soil on a