Tag : BC3

Titration of a Diprotic Acid Lab Steps

Objective: The purpose of this experiment is to determine an unknown diprotic acid by examining its molecular weight using titration. Procedure: (1) Dissolve 0.120 g of the unknown in 100 mL of distilled water. (2) Place the 250 mL beaker ontop of a magnetic stir plate, and suspend a pH electrode into the solution using a ring stand. (3) Fill buret to 0 mL level with sodium hydroxide, prepare computer software. (4) Wait for pH to stabilize then keep data […]

Heat Transfer Lab Experiment

Heat is the transfer of energy between matter due to differences in temperature. In this experiment, heat transfer was studied by calorimetry. The mixing of warm and cool water was observed, as well as the experimental latent heat of fusion. Data: Mixing Warm and Cold Water Table Mass of Empty Graduated Cylinder 86.9 grams Trial 1 Trial 2 Mass of Graduated Cylinder and Cold Water 136.00 g 136.15 g Mass of Cold Water 49.10 g 49.25 Temperature C, Probe 1 […]

Newton’s Law of Cooling Lab Experiment

This experiment was designed to model the process in which thermal energy moves from one body to another. Newton observed that the energy transfer between two bodies is proportional to the difference in temperature between the bodies. The cooling of hot water to room temperature will be observed for the model. Data table: Average room temperature (°C) 30.29 Initial Water Temp (°C) 70.3   Analysis: Newton’s cooling law was given above as: T = T0 e–kt + Troom Match the variables […]

Specific Heat of Metals Lab Experiment

This experiment was conducted to identify a quantity of unknown metal using calorimeter and conservation of heat principles and determine specific heat of metals. Specific Heat of Metal by definition: The heat required to raise the temperature of the unit mass of a given substance by a given amount (usually one degree). William Cleghorn invented the concept of specific heat to explain the different amounts of thermal energy that different materials absorb when their temperatures increase. He’d measured latent heats — […]

Paraphrasing Exercise

Paraphrasing by Definition: Express the meaning of (the writer or speaker or something written or spoken) using different words, especially to achieve greater clarity. Paraphrase Several compelling sources from Karnasiewic’s essay “The Campus Crusade for Guys” agree that strong affirmative action exists for males in many postsecondary schools. Public schools attempt to balance gender ratios in spite of applicants’ merit and the law. In fact, recent anti-affirmative action lobbying may have driven such policies behind locked doors (910). Paraphrase with […]