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Qualitative Analysis:_Determining_Densities_of_MetalsList some possible sources of error for this lab_Write two things you leamed in this lab. For_fullcredit be tho...

Question

Qualitative Analysis:_Determining_Densities_of_MetalsList some possible sources of error for this lab_Write two things you leamed in this lab. For_fullcredit be thorough and explicit

Qualitative Analysis:_Determining_Densities_of_Metals List some possible sources of error for this lab_ Write two things you leamed in this lab. For_fullcredit be thorough and explicit



Answers

Describe the two types of errors possible in a hypothesis test decision.

Question Number one in this section introduces you to calorie Mitri and asks you to describe three possible sources of error in a Kalorama tree experiment. In order to identify three sources of error, we need to have some understanding of the set up in Kalorama tree were measuring the heat transferred. So we're measuring the heat that is produced from substance that say is combusted and it being transferred into the water. So we need to know the change in temperature accurately. Sometimes all the heat is not transferred to the water, so that's definitely one error that can occur is not all heat goes to the water. Also, we need to be able to measure the temperature accurately. So we need to have a good thermometer that measures fractions of a temperature. So another possible error might be temperature measurement. You might come up with several other errors than the ones that I'm listing here. But these air just potential errors. The last one might be not all of the substance combusted. So say we put 100 g in here and we assumed that the 100 g was combusted completely to transfer the maximum amount of heat to the water if it, if not all of it combusted than our calorie mitri calculations due to the change in temperature of water, would be incorrect.

They're always a couple of things you want to do before you're starting any kind of lab procedure, Obviously, in chemistry environment. Ah, one, just like with shooting here. One you want to dress appropriately wrench yourself from getting hurt in case there is an accident. Like always wearing eye protection, having close up kind, protect your skin and what's not shown yours. Ah, particularly your feet with, like, closed toed shoes. Nothing like sandals or flip flops. Um, along with that know where, uh, safety is, um, anything from like if there's, like a hazard of some sort, like if there's a fire selling goes out, where are the fire extinguishers? Were the I washers in case something does get into your eye? We need to know where those things are. Teoh always need a lot of instructions. You want to know what exactly we're doing on usually in those instructions. They have safety procedures. How to best handle certain pieces equipment. Some clue in, for instance, shouldn't be in a plastic square ball. You have to use like pretty good glassware to me to keep contain some of these solutions three banks goes with run to If you have the right. Ah, chemicals reaction. Along with that, the right equipment. You may not be a microscope. You just made that. Just need a balance of some sort. Uh, you may need some way, Teoh. Have some filter is ready and available Ph. Ph. Meters. Just in case. A lot of stuff needs to be ready before you start experiments.

This question is in reference to laboratory safety. Often when we consider laboratory safety, we're only thinking of ourselves, or maybe thinking of the other people that are also in the laboratory. The laboratory safety can include a little bit more than this. We need to make sure that we're safe when we're in the laboratory. We need to make sure other people also in the laboratory with us are safe. And we need to make sure that anybody entering the laboratory after us will be safe. So this includes before leaving the laboratory that we do certain things one of them would be cleaning up your workstation so that if anything is left out, nobody will happen upon it or not know what to do with it. And if they don't know what to do with it, then there could be an accident. We also need to make sure that we turn off any laboratory equipment that we were using and appropriately store it. Put in a glass where, back in its drawer, put any hot plates or Bunsen burners back in their appropriate locations. We, of course, want to make sure that we turn off the equipment so that we don't don't lead burnt Bunsen burners running or hot plates on which are common mistakes. We also need to make sure that we dispose of our chemicals appropriately. We don't put the chemicals back in the container. We put them in a disposal container. And oftentimes there are several different disposal containers dependent on the chemicals that you're disposing of. We should turn off running water dripping water. Often times the foster has left on. We should close the fume hood sashes.

In this question, we are given student I d numbers and we want to determine whether the data is qualitative or quantitative. Student i d numbers are no meaningful numerical values, and thus the numbers simply re present categories. And hence we can see that the variable in this case there is a student I D numbers is qualitative. So this is a qualitative level off measurement. Qualitative data. Yeah, cooperative.


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