1)when completing the procedure of the density experiment , the situations descr
ID: 818478 • Letter: 1
Question
1)when completing the procedure of the density experiment , the situations described below occur, in each case, tell whether the situation described would cause the experimental value of the density of the unknown liquid to be greater than, less than, or unnchange from the theoretical value. explain
A) the student blows out the last drop of liquid remaning in the pipet into the flask.
B) a piece of dirt sticks in the upper part of the pipet tip throughout the liquid measurements.
2) tell whether each situation would cause the experimental value for the density of the solid to be greater than, less, or unchamged from the theoretical value. explain
a) part of the solid dissolves in the water
b) the student uses tap water, rather than deionized water,
c) should the pipet be dried before it is used to measure the unknown liquid? explain
Explanation / Answer
A.) Increase : since the last drop is blown out, => volume is less than actual
B.) Increase : mass has increased
2.)
a.)less than// mass has decreased
b.)less than : ionization will lead to the dissociation of solid,=> mass will decrease
c.) yes the pipette should be dried else it will add an extra volume of liquid giviing density a lesser value.
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