Chem 11 Safety Quiz

When acid is splashed into someone's eye, the immediate action should be to spray or pour water on the eye. This is because water helps to dilute and rinse out the acid, minimizing its harmful effects on the eye. It is important to flush the eye with water for at least 15 minutes to ensure thorough rinsing. Keeping the eyelid closed and calling for a doctor is also recommended, as medical attention may be necessary to assess and treat any potential damage caused by the acid. Applying a bandage with antiseptic cream or putting baking soda on the area around the eye is not appropriate in this situation.

Adding excess chemicals to the original stock bottle is not the correct procedure. This can lead to contamination of the entire stock and may result in inaccurate measurements and experimental errors. It is important to add the required amount of chemicals to maintain the integrity and accuracy of the stock solution.

To check the odor of a chemical, it is recommended to gently wave the air towards you with your hand. This method allows for a controlled and gradual exposure to the odor, preventing any strong or potentially harmful fumes from directly reaching the nose. By waving the air towards you, it helps to disperse the odor and allows you to get a sense of the smell without overwhelming your senses. Sniffing directly over the container or blowing the air towards you with a fan can result in a sudden and concentrated exposure to the odor, which may be unpleasant or even dangerous.

Safety goggles are not only worn when you are actually handling chemicals. They are worn in any situation where there is a risk of eye injury, such as when working with tools, machinery, or in environments where there are flying objects or particles. Safety goggles provide protection from various hazards, not just chemicals. Therefore, the statement is false.

The correct description for the WHMIS symbol is "Compressed gas." This symbol is used to indicate substances that are stored under high pressure and can explode or cause damage if mishandled. These materials are typically contained in cylinders and can pose a risk if they are not handled properly.

While doing an experiment in the science lab, it is important to take certain precautions if you wear contact lenses. Firstly, you should be aware that some fumes can affect the materials of contact lenses, so it is necessary to be cautious about the chemicals and fumes present in the lab. Secondly, always wear eye protection such as safety goggles or a face shield to protect your eyes from any potential hazards. Lastly, it is advisable to never adjust the contact lenses in the science room as it may lead to contamination or damage. Therefore, all of the above precautions should be taken while doing an experiment in the science lab if you wear contact lenses.

The correct description for this WHMIS symbol is "Poisonous and infectious material." This symbol is used to indicate substances that are toxic and can cause harm if ingested, inhaled, or come into contact with the skin. These materials may also have the potential to spread infectious diseases. It is important to handle and store these substances with caution to prevent any harm or contamination.

Covering the open end of the test tube with a paper towel should not be done when heating a liquid in a test tube over the Bunsen burner flame. This is because the paper towel can easily catch fire and cause a hazardous situation. It is important to use a test tube holder to hold the test tube securely while heating, gently move the test tube to ensure even heating, and ensure that the open end of the test tube is not pointing at anyone to prevent any potential accidents or injuries.

When you have finished a lab, you should dispose of the chemicals you were using by either pouring them down the sink with a lot of water after checking with the teacher or by placing them in a special container provided by the teacher. The appropriate method of disposal may vary depending on the specific chemicals used and the instructions given by the teacher. It is important to seek the teacher's advice to ensure proper and safe disposal of the chemicals.

The recommended way to find out whether an object is hot or cold is by bringing the back of your hand close to the object. This method is recommended because the back of the hand is more sensitive to temperature than the palm. By using the back of the hand, you can better gauge the temperature of the object without the risk of burning yourself or getting a false reading.

If your clothing catches fire, running quickly for help is not the recommended action. This is because running can fan the flames and cause the fire to spread more rapidly. Instead, it is important to remember the "Stop, Drop, and Roll" technique, which involves dropping to the ground, covering your face, and rolling back and forth to smother the flames. Yelling immediately for help is also a good idea to alert others nearby. Getting under and turning on the safety shower is not applicable in this situation, as safety showers are typically used for chemical spills or exposure rather than fire emergencies.

The correct answer is 772 deg. C. This is the melting point temperature of KCl (potassium chloride) according to the provided MDSD link.