1. which procedure would best allow a scientist to observe a chemical property of hydrochloric acid (HCI) solution
A cooling the HCI solution until it becomes solid and measure in this temperature
B Adding zinc to the HCI solution and examine whether or not bubbles are produced
C placing a conductivity probe into a beaker of HCI solution to determine if it conducts electricity
D Measuring the mass of an volume of a sample of HCI solution to find its density
To observe a chemical property of hydrochloric acid (HCl) solution, a scientist can perform a procedure called a chemical reaction. Here's how they can do it:
1. Safety first: Ensure to wear appropriate lab safety gear, such as gloves, goggles, and a lab coat.
2. Collect the required materials: You will need hydrochloric acid (HCl) solution, a test tube or a glass beaker, and a substance that can react with HCl.
3. Set up the experiment: Pour a small amount of the HCl solution into the test tube or glass beaker.
4. Add the reactant: Choose a substance known to react with hydrochloric acid, such as magnesium ribbon (Mg) or marble chips (calcium carbonate, CaCO3). Add a small piece or a few chips of the reactant to the HCl solution.
5. Observe the reaction: As the reactant combines with hydrochloric acid, a chemical reaction will occur, resulting in the formation of new substances. Look for any changes, such as bubbles, effervescence, heat, color change, or gas production.
6. Note the observations: Carefully observe and record any visible changes that occur during the reaction. This may include the release of gas, the disappearance of the reactant, or a temperature change.
7. Analyze the results: Based on the observations, the scientist can determine the chemical property of hydrochloric acid, such as its ability to react with certain substances, release gas or heat, or change the color or appearance of other substances.
By performing this procedure, the scientist can effectively observe a chemical property of hydrochloric acid (HCl) solution through the process of a chemical reaction with a reactive substance.