scenario question

Question

1. Which laboratory terminology best describes the following scenario:

"When aqueous solutions of sodium carbonate and nickel (II) chloride were combined, the solution became cloudy"

a. Human Error

b .Experimental Error

c. Control

d. Precipitate

2. Which laboratory terminology best describes the following scenario:

"A portion of the product was lost when transferring the filter paper to a watch glass, resulting in a lower than expected percent yield"

a. I.Control

b.II.Experimental Error

c. III.Human Error

d. IV.Precipitate

3. Which laboratory terminology best describes the following scenario:

"A reaction between aqueous iron and thiocyanate ions produced a solution with a deep red color. This result was compared against a second test, in which aqueous thiocyanate ions were introduced to iron that had been treated with phosphate ions, and no color change was observed."

a. Experimental Error

b. Precipitate

c. Human Error

d. Control

Answer 1

1. d. Precipitate
2. b.II.Experimental Error
3. d. Control