# A lab experiment to determine the density of different objects by finding their mass and volumes

Because mass is measured in grams and volume in cubic centimeters, the result will be expressed in terms of grams per cubic centimeter.

Weigh the cylinder, water, and zinc pellets on the balance. The balance should read zero.

Start with the smallest object first and progress in order of increasing object size. Calculate the slope of this line, which is the density of the unknown solid.

A famous story credits the Greek philosopher Archimedes, who discovered a king's crown was not pure gold; he calculated the crown's density and found it was less than that of gold. One milliliter is equivalent to one cubic centimeter. Weigh the cylinder, water, and pellets.

## A lab experiment to determine the density of different objects by finding their mass and volumes

Use the measurements to calculate the density of the water. Subtract the mass in step 1 from the mass in step 2. Now that you understand the concept of density, let's take a look at two protocols for accurately determining the density of a liquid and a solid. A graduated cylinder large enough to hold both the object and enough water to fully immerse it is the best tool for this job. Addition of the solid causes an upward displacement of the liquid, resulting in a new volume reading. Since the mass and volume of the liquid and its container must be determined before its density can be determined, there is a five-step process for calculating the density. Tossing it in can break the bottom of the graduated cylinder. The container to hold the sample also used to measure volume is weighed and tared, so only the sample mass appears on the balance display when the sample is added to the container. Most solid substances are irregularly shaped, which complicates volume determination. Density The fifth step for determining the density of the liquid is to divide the mass of the liquid by its volume. Using a graduated cylinder, analytical balance, and water as the displaced liquid, the density of zinc metal can be determined. How does the instrument error compare to standard deviation error? Results Some example results could be: Object. Precise filling to that mark increases reproducibility and data quality. Use your thermometer to record the temperature of the water in your graduated cylinder.

Rated 7/10
based on 97 review

Download