Question

A general chemistry student performs an experiment in which two liquids are mixed and, as soon as they meet, a white solid forms in the solution. Which of the following is a quantitative observation that could be derived from the result of this experiment?

a. The mass of the solid formed is 0.5 g.
b. The solid formed is white.
c. A volume of 10 mL of each of the liquid components was used in the experiment.
d. The solid forms quickly after the liquids are mixed.

Answer 1

The quantitative observation from the chemistry experiment is the mass of the solid formed, which is recorded as 0.5 g, providing specific numerical data about the precipitate formed from mixing two liquid components.

Step-by-step explanation:

In the context of a general chemistry student's experiment, a quantitative observation refers to a numerical measurement that is derived from the experiment. Among the given options, the correct quantitative observation would be:

a. The mass of the solid formed is 0.5 g.

This is because the mass of the solid formed after mixing the two liquid components is a measurable quantity that provides specific information about the amount of the precipitate. In contrast, options b, c, and d describe qualitative observations (the appearance of the solid, the volume of liquids used, and the rate at which the reaction occurs, respectively), which do not provide numerical data about the outcomes of the chemical reaction.

Answer 2

A. The mass of the solid formed is 0.5g

Step-by-step explanation:

An experimental observation can either be QUANTITATIVE OR QUALITATIVE. A quantitative observation is that which uses numerical representation to describe collected data. Examples are height, volume, mass etc.

According to this question, a student performs an experiment in which two liquids were mixed to result in the formation of a WHITE SOLID in the solution. Based on the options provided, the quantitative observation that could be derived from the result of this experiment is that "The mass of the solid formed is 0.5g".

Note that, the option that states that: volume of 10 mL of each of the liquid components was used in the experiment is also a qualitative observation but it is not derived from the RESULT of the experiment.