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Chemistry lab

Lab midterm

QuestionAnswer
What is the technique that is used to measure the volume displaced by a solid when it is submerged in a liquid? volume by displacement
What is the volume in the graduated cylinder? volume by displacement
What is the relationship between 1 cc and 1 mL? cc represents mass while mL represents volume
You weigh a sample and the balance reports a mass of 10.025 g. The density of the sample is known to be 2.12 g/mL. What is the volume? 4.73
A piece of aluminum foil is found to be 5.00 cm long by 5.10 cm wide. The mass is reported as 25.000 g. Under the knowledge that the density of aluminum is 2.70 g/ml, find the thickness of the foil. 0.363
A graduated cylinder has an initial volume of 54.8 mL. After adding a rubber stopper weighing 3.168 g into the graduated cylinder, the volume increases to 57.6 mL. What is the density of the rubber stopper? (Be sure to watch significant figures.) 1.1 g/ml
What color flame test indicates the presence of Potassium (K)? purple
What color flame test indicates the presence of Lithium? fuchsia
What color flame test indicates the presence of sodium? orange
What color flame test indicates the presence of strontium? bright red
What color flame test indicates the presence of Calcium? brick red
What color flame test indicates the presence of barium? green
Are hexane and water miscible or immiscible? immiscible
Which element is not an Alkali metal? Cl
Match the group numbers and names. Group 1A Group 2A Group 7A Alkali Metals, Alkali Earth metals, Halogens
What says that the physical and chemical properties of the elements recur in a systematic and predictable way when the elements are arranged in order of increasing atomic number? Periodic Law
What is a safety hazard for this experiment? working with an open flame
What is the name for an insoluble solid substance produced from a reaction? precipitate
Did Barium have a reaction to Ammonium Carbonate? Ppt
Did Calcium have a reaction to Ammonium Carbonate? Ppt
Did Lithium have a reaction to Ammonium Carbonate? Nr
Did Potassium have a reaction to Ammonium Carbonate? Nr
Did Sodium have a reaction to Ammonium Carbonate? Nr
Did Strontium have a reaction to Ammonium Carbonate? Ppt
Did Barium have a reaction to Ammonium Sulfate? Ppt
Did Calcium have a reaction to Ammonium Sulfate? Nr
Did Lithium have a reaction to Ammonium Sulfate? Nr
Did Potassium have a reaction to Ammonium Sulfate? Nr
Did Sodium have a reaction to Ammonium Sulfate? Nr
Did Strontium have a reaction to Ammonium Sulfate? Ppt
What was the color did Bromide produce in the hexane layer? Orange
What was the color did Chloride produce in the hexane layer? Clear/pale yellow
What was the color did Iodide produce in the hexane layer? purple
Which type of compound is not flammable? Inorganic
CH3OH is____ in water. soluble
C3H8 is ____ in water. insoluble
CH3OH is _____in hexane (C6H14). insoluble
C3H8 is _____in hexane (C6H14). soluble
What are the products of a combustion reaction? CO2, water, heat
Created by: Anm02
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