Test Time!

Today was the day of the unit test, but I missed class due to an orthodontist appointment. Since I missed class today I will most likely be taking the test tomorrow after school. I feel pretty confident about this unit so far, my only worry is finding molecular and empirical formulas. The method to finding them is quite tedious and requires a lot of time. Unfortunately the test has a time limit, which means I have to answer the questions rather quickly in order to finish in time. I have a few links to websites that might help out anyone else taking the test this week, and also might help on the final exam. Here they are: Chemteam.info, Purdue.edu, Wisc.edu

Difference between empirical and molecular formulas

How to find empirical formulas

Mole Conversion Lab

Yesterday me and a lab partner completed a lab regarding the dehydration of the originally hydrous mixture copper sulfate. The objective of the lab was to use the difference method to determine the amount of molecules there are of water in the original hydrous compound copper sulfate. This required using a bunsen burner to dehydrate the mixture. Through multiple calculations and measurements we finally found out the answer. The method we used can be found on this website which is linked below.

Click here

This is the original CuSO4 with Water

This is after all the water has evaporated

Lab Tomorrow!

On Monday our class took a pretest for our current unit, and I have to say, I'm honestly scared. I wouldn't be surprised if I got a 20% on it, luckily it doesnt count, as always, but it does tell me that i truly know nothing about this current unit. Throughout the week I tried my hardest to pay attention, and so far I am understanding most of it. Tomorrow, our class has a Lab, and I'm honestly afraid of the pre-lab quiz, because on Friday our class learned a new equation that is used to find how much of a compound is water, or how much water was in the compound. During class i was completely lost, and was losing all hope, but thankfully I was able to find this website that not only helped me with this equation, but also on converting units to moles. The website is linked below.

Click here

Converting to Moles

We learned how to convert molecules and mass to moles earlier this week. At first I was grasping the concept but when trying to from mass to molecules I kept accidently messing up the conversion. Even when using a road map to help me, I often set the equation up incorrectly. I decided it might help if I were to find an online source and I found this, it really helped me fix my conversions, and helped me memorize how to convert to moles. I have the link Below.



Click here

Last Meal Project

On Friday our class turned in a project in which we had to take a recipe and convert it into metric units in order to help us practice our conversions from standard to metric units. At first I was skeptical of the project since I saw it as a waste of time, but I started to realize that I was getting more accurate and more efficient as I did more and more of the project. Once I had finished I was able to do the conversions like thy were nothing, and I had multiple conversions memorized. My personal favorite part of the project was creating the food and bringing it in on Friday where everyone shared their food. I made snickerdoodle cookies which were voted as the best cookies in the class. One of the uses I found soon after completing the project was that the Unit Test was more than 60% conversions, so I was quite happy when I was able to write down answers like they were nothing at all. Here is a link to a website that helps with unit conversions between standard and metric,
Click Here

Matter and Measurement Unit Test

Over the course of this week I had been studying for a test that was on Thursday, October 29th, and I feel confident that I will receive a grade that is around 90% which I am grateful for. I feel that I could have studied more though. I took multiple online practice tests, and I read the chapter over a few times, but I didn't make flash cards or look up any questions I didn't understand. I hope in the future I can perform better on unit tests, so I won't have to worry about getting an A in the class.