Q1.when using suction filtration it is important to? 1. disconnect the hose from
ID: 910820 • Letter: Q
Question
Q1.when using suction filtration it is important to? 1. disconnect the hose from the sidearm flask before turning off the water. 2. ensure that the filter paper cover all the holes in the buchner funnel. 3. wet the filter with a mall amount of deionized water before starting to filter. 4. clamp the sidearm flask to a ringstand for stability. 5. 1and3only 6. 2,3,and4only 7. 1,2,3,and4 Q2.true or false, cleaning up spills on the balance is the reponsibility of th TA. Q3. true or false, during evaporation, it is important to turn down the temperature of the hotplate as the liquid level in the container decreases to prevent splattering. Q4. select the statement(s) that are true about the chemical safety and handling of reagents available in lab? 1.there are no known hazard for calcium carbonate. 2. there are no known hazard for isopropyl alcohol. 3. isopropyl alcohol is flammable, an irritant, and may be toxic. 4. hydrochloric acid is very hazardous, it is toxic, corrosive, and an irritant. 5. there are no known hazard for copper sulfate. 6. there are no known hazard for benzoic acid. 7. calcium carbonate is an irritant and may be toxic. 8.Copper sulfate may be toxic and is an irritant. 9There are no known hazard for hydrochloric acid. 10. Benzoic acid is flammable, toxic, and an irritant
Explanation / Answer
Q1.when using suction filtration it is important to
Answer:
a) ensure that the filter paper cover all the holes in the buchner funnel.
b) wet the filter with a mall amount of deionized water before starting to filter.
c) clamp the sidearm flask to a ringstand for stability
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