Question

which of these pieces of equipment would be the most appropriate for precisely measuring 29 mL of liquid? Explain your reasoning, citing evidence related to the divisions on each tool and the concept of an estimated digit.​

Answer 1

This is the sample answer (assignment's correct answer):

The graduated cylinder is most appropriate. Because its smallest divisions are 2 mL, increments between each 2-mL division are estimated. Measurements can therefore be stated to a single milliliter.

Just make some changes to the writing and youre good to go.

Answer 2

The best equipment would be the graduated cylinder. Why?

Firstly, the smallest marking on the graduated cylinder is 2 mL, while on all the others the smallest marking is way above that, like 25 mL and 100 mL.

Without even going into the details, we can first rule out the volumetric flask, since its smallest marking is 100 mL and even that is already bigger than our sample size, hence we would have no markings to accurately measure out 29 mL of our sample had we used the volumetric flask.

Next to be ruled out would be the Erlenmeyer flask, as you can see in the image, it only has three marking, and as the smallest marking is 25 mL, each marking is at least 25 mL, and even so far as going up to 50 mL. This cannot let us accurately measure 29 mL out at all, due to the markings being way too big to do that. Hence, the Erlenmeyer flask is ruled out.

Finally, the beaker seems to be a worthy candidate! Unfortunately, for the same reason as the Erlenmeyer flask, as you can see in the image each marking represents 10 mL. We cannot measure 9 mL in the beaker accurately, and hence the beaker is ruled too.

We are left with the graduated cylinder, and that is our answer.

Step-by-step explanation:

Hope this helped!