Question

mark wants to measure the rate at which an ice cube melts. he collected graph paper, an ice cube, and a petri dish. the petri dish is transparent. what other item of apparatus does he need to mesure the rate of melting?

Answer 1

Answer:

For determining the rate at which an ice cube melts at room temperature, mark needs an ice cube, transparent petri plate, graph paper along with a pipette and measuring cylinder for measuring the amount of water that is formed at the end of each time point. He also requires a stop watch for noting the time at the end of which he needs to take the reading.

The experiment is conducted as follows:

• Place the ice cube in a dry and clean petri plate at room temperature and note the time as 0 min and volume of water formed as 0 ml.
• Start the stop watch
• At the end of 2 mins. collect the water formed using a pipette into a measuring cylinder and note the volume of the water that is collected (x)
• For the third reading after another 2 mins. add the melted water to the measuring cylinder and note the increased reading (y). Calculate y-x to determine the amount of water collected for this time point.
• Continue this experiment till the ice completely melts and all the water is collected in the measuring cylinder.
• Plot a graph of time versus amount of water collected at each time point.