0
Why is the collected soil sample dried before weighing in soil analysis?
Wiki User
∙ 15y ago
because the hydrogen cells in the H2O will give the soil an unbalance when being wheighed because the hydrogen cells in the H2O will give the soil an unbalance when being wheighed
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What substance found in a soil sample collected in an arid region would most likely be absent in a soil sample collected in a humid region?
rock salt
Why is it important to follow the procedure for collecting soil sample?
So that the sample YOU collect can be objectively compared with others collected by different people.
Well water is rust colored?
Take a sample for analysis.
How do you dianose well water?
Take a sample in a sterile bottle to a lab for analysis
Does well water have a high alkalinity?
It might or it might not. Find out by testing it with a 'pool kit' or taking a sample to a lab for proper analysis. -If you drink it this is essential.It might or it might not. Find out by testing it with a 'pool kit' or taking a sample to a lab for proper analysis. -If you drink it this is essential.
What are the laboratory apparatus for sieve analysis?
sieve shaker,dry sample of aggregate,pam and cover,weighing machine
What is digestion in gravimetric analysis?
gravimetric analysis is the study of weighing certain compounds, comparing, heating, precipitating, to give us the mass of a specific molecule as a result gravimetric analysis is the study of weighing certain compounds, comparing, heating, precipitating, to give us the mass of a specific molecule as a result
How do you find the mass of water lost in hydrate?
By weighing the sample before and after heating to dehydration.
What is a Random sample poll?
A random sample is a sample that is collected without any specific characteristics in mind. For instance, instead of collecting a sample of women or members of a particular age group, they are collected randomly off the streets.
Why your well water is sticky what is the treatment?
Take a sample to a lab and get an analysis to see WHY it is "sticky"Take a sample to a lab and get an analysis to see WHY it is "sticky"
Is the data is sample or population?
Data is neither sample nor population. Data are collected for attributes. These can be for a sample or a population.
How is fat content determined by soxhlet method?
The Soxhlet method for determining crude fat content is a lengthy process requiring up to a day for a single analysis. The solvent extraction step alone takes six hours. The method is therefore not favoured for routine testing purposes in the meat industry, rather it is used as a standard reference method. As well as being used to determine the fat content of meat and meat products, the Soxhlet method can be used to determine the fat content of meat meal. In the case of meat meal, the Soxhlet method is often the method of choice as a routine test. Crude fat content is determined by extracting the fat from the sample using a solvent, then determining the weight of the fat recovered. The sample is contained in a porous thimble that allows the solvent to completely cover the sample. The thimble is contained in an extraction apparatus that enables the solvent to be recycled over and over again. This extends the contact time between the solvent and the sample and allows it time to dissolve all of the fat contained in the sample. In order for the solvent to thoroughly penetrate the sample it is necessary for the sample to be as finely comminuted as possible. Before the solvent extraction step can begin the sample must be dried. Often a moisture analysis is required as well as a fat analysis and this can be achieved by accurately weighting the sample after drying and before extraction, as well as before drying. If a moisture analysis is not required the sample need only be weighed before drying and again after solvent extraction. In either case the sample must be weighed accurately on an analytical balance at each stage of the analysis. When the sample is being weighed it is important not loose any part of it including any moisture that may weep from the sample during weighting. Loss of this moisture can be avoided by weighing the sample directly into a pre-dried extraction thimble or alternatively on to a pre-dried filter paper. If a moisture analysis is required, the dried extraction thimble or filter paper also has to be pre-weighed. After weighing, the sample (in the thimble or filter paper) can be placed in the oven for drying. After drying, the sample can be placed directly into the distillation apparatus for extraction.
What substance found in a soil sample collected in an arid region would most likely be absent in a soil sample collected in a humid region?
rock salt
Why does a statistical sample have to be large?
The larger the sample of data collected leads to a more accurate conclusion.
Would the reported molarity of the vinegar sample be affected by an error in weighing?
Yes, you could possibly have errors in your data about the molarity of a vinegar sample during a titration experiment if there was an error made during weighing.
A sample collected by drilling into Earth's surface with a hollow drill and pulling out a column of soil and rocks?
a core sample
A sample group is a small group from which data is collected?
False
