The process of separating the solid from the liquid can also be accomplished by gravity filtration. Why is vacuum filtration used in this experiment? The crystals are too fine. The percent yield is always higher It is quicker! It removes most of the liquid
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The process of separating the solid from the liquid can also be accomplished by gravity filtration. Why is vacuum filtration used in this experiment?
The crystals are too fine.
The percent yield is always higher
It is quicker!
It removes most of the liquid
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- How does the fractionating column make distillation more precise? A. The added distance gives more leeway for expanding gases so as not to explode. B. The added distance increases temperature of all vapors involved C. The added distance from the condenser forces heavier vapors to condense off early D. The added distance lets the thermometer get a more stable temperatureThe process of separating the solid from the liquid can also be accomplished by gravity filtration. Why is vacuum filtration used? A. The crystals are too fine B. The percent yield is higher C. Gravity filtration would not work with hot liquids D. It is quickerFiltration of samples A, B, and C show no residue left. After letting them dry in different beakers, SAmple A remains no residues. Sample B shows crystal leftovers, and sample C show brown film on the beaker walls. This means that: a. Two or more samples are heterogenous b. Two or more samples are homogenous c. all sample have 2 or more phases d. all samples are pure
- why is a fractionating column better able to separate liquids?5. Which tablet size and the liquid combination resulted in the fastest dissolution times? A. crushed, room temperature water B. crushed, hot water C. crushed, room temperature vinegar D. broken, hot water E. broken, room temperature vinegar 6. What is the relationship between particle size and the time it takes for the tablet to dissolve? A. direct proportion B. inverse proportion C. combined proportion D. joint proportion 7. Using the activity as a model, how does mechanical weathering (breaking or crushing) contribute to chemical weathering (dissolution)? A. Increases size of particles B. Decreases dissolution time C. Increases surface area D. Both A and B E. Both B and CTime (min The investigator used one of the following substances in this experiment. Melting and Boiling Points of Four Substances Melting Point Boiling Point (°C) Substance (°C) 1 20 100 40 140 3. 70 140 80 160 Which of these substances was used in this phase change investigation? A. Substance 2 B. Substance 4 C. Substance 3 O D. Substance 1
- In distillation, the composition of the volatile component is governed by which law? * Your answerTopic: GRANULES ( I ALREADY ANSWER IT BUT I AM NOT SURE WITH MY ANSWERS, I NEED AN EXPERT TO DOUBLE CHECK MY WORK THANK YOU!!!!) 1. Granules are easier to compress than powders. II. Granules occupies greater volume per unit weight than powders. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE (MY ANSWER IS A)) 2. Granules prevent the aggregation of powders. II. Moisture and heat labile reagents are preferred in granulated preparations. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE (MY ANSWER IS C) 3. Wet granulation requires the use of 2 points roller compactors. II. Wet granulation is a prerequisite to avoid the damage of active components in the powder. A. If both statements are TRUE B. If the FIRST statement is only TRUE C. If both statements are FALSE D. If the FIRST statement is only FALSE…A theoretical plate is: the theoretical glassware it takes to distill a specific mixture. an evaporation/condensation cycle. a chromatographic technique used to analyze your distillate. a hot plate used to heat the distillation apparatus.
- The percent of water in an unknown hydrated salt is to be determined by weighing a sample of the salt heating it to drive off the water cooling to room temperature and re-weighting. Which procedural mistake will explain a determined very low % of water. I. Heating the sample in a closed rather than an open container II. Re-weighting the sample before it has cooled to room temperature. I only Both I and II II only Neither I nor IISublimation is preferred over recrystallization when you work with an amount of solid material to be purified that weighs: A) at least 1 kg B) about 100 mg C) about 1 mol D) about 1000 ml A ODWhich solvent should be used to wash the solid material collected from a filtration? Select one: The same solvent as the liquid in the original mixture Acetone Deionized water O Any solvent in which the solid can dissolve