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WorksheetsPhyChem1Ex4
Total questions: 11
Worksheet time: 6mins
What is a precipitate?
A soluble solid
A soluble crystal
An insoluble solid
Hard to describe or observe
What are the physiologically important ionization states for iron?
Ir(II) and Ir(III)
Fe(II) and Fe(III)
Fe(I) and Fe(II)
Ir(I) and Ir(II)
Physiologically, what are minerals?
21 elements found in the human body in ionic form
needed or present in large or very small amounts
common throughout nature and in food
all of the above
What are trace minerals and what is an example of a trace mineral?
minerals needed and/or present in very small amounts; calcium
minerals needed and/or present in very large amounts; phosphate
minerals needed and/or present in somewhat large amounts; calcium
minerals needed and/or present in very small amounts; iron
Potassium ferricyanide assay with milk results in which color/result combination?
Fe(II) and dark blue
Fe(III) and green
no ionized iron and yellow
all of the above
Which polyatomic anion did we investigate?
calcium
iron
phosphate
casein
What is the correct sequence in the procedure to detect calcium ions in milk?
dilute milk with water, add water, filter, transfer filtrate to test tube, add ammonium oxalate solution, detect precipitate
dilute milk with water, add acetic acid, filter, transfer filtrate to test tube, add ammonium oxalate solution, detect precipitate
dilute milk with water, add ammonium oxalate solution, filter, transfer filtrate to test tube, add acetic acid, detect precipitate
dilute milk with water, add acetic acid, filter, transfer filtrate to test tube, add potassium ferricyanide solution, detect precipitate
What is the name of the liquid that you recover when you perform a filtration?
The filtered
The filtrate
The philtrum
The filter paper
In the ammonium oxalate/milk experiment, what indicates the presence of calcium?
Formation of a dark blue color
Formation of a green color
Formation of a precipitate
Formation of strong bones
When detecting calcium ions, what is the name of the precipitate?
Calcium ammoniate
Calcium oxide
Calcium oxalate
Javier
Which reagent was used to detect phosphate anion in milk?
Nitric acid
Ammonium molybdate
Potassium ferricyanide
Ammonium oxalate
