Month: October 2015

Science App Review (Chem Pro)

alexr2015

When you first open this app it shows you a whole bunch of chemistry topics that you can choose from. Once you click on a topic it brings you to a video that you can watch. There are also flash cards, a periodic table to reference to, and even an equation sheet, to show you how to calculate things like density, and converting Celsius to kelvin.screen480x480

Is the app easy to use? Yes, the app was easily accessible, laying out multiple subjects on atoms for you to choose from, ranging from atomic mass to elemental analysis.

Can it be understood quickly? The app does not give you strict instructions on how to use it, but simply clicking on a subject brings you to a video on the selected subject.

Can the app be used as a learning tool rather than a game? There is no way that you can use this app as a game. But this app contains a plethora of information that is easy to view.

Is the app able to teach you? The videos are easy enough to watch. Small videos that are eight minutes are easy to watch, while longer videos may require you to get comfortable for a while.

Is the app intriguing and easy to pay attention to? Or do you get bored while using it? The videos are engaging enough. Simple videos, like atomic mass, only take up 15 minutes of your time, while more complicated lessons take 30 minutes, sometime longer.

Is the app free? The app comes with 10 lessons on chemistry, but the full app has 80 different videos talking about different subjects in chemistry. Each set of 10 lessons costs $2.29, but you can get all seven lesson packs (70 different videos) for $11.99.

The CC (Chemical Change) in a Bag

alexr2015

I am waiting for my partners to send me photos and videos of the lab.

SCIENCE 9: Bag of Change

 

PREFACE:

In this activity, you will mix 3 unknown substances together in a bag and observe the changes that occur noting chemical change and physical change. Observation skills are crucial for this investigation.   Watch for changes in state (solid, liquid, gas), colour (use noun-colour description), volume (mL), temperature, and anything else you can detect.   Do not smell any of this substances please.

 

MATERIALS:   PLEASE NOTE WHMIS LABELS AND ACCORDINGLY SAFETY

·        Chemical A (a white solid)

·        Chemical B (a white solid)

 ·        Chemical C (a blue liquid)

·        50 mL graduated cylinders

 ·        Plastic bag

·        goggles

 

 

PROCEDURES:    GOGGLES ARE DONNED & NOT REMOVED UNTIL LAB CONCLUSION!!!!

  1. Add one spoonful of Chemical A on the left side of the ziplock bag. Describe and record the properties for Chemical A.  Add 1 spoonful of Chemical B on the right side of the ziplock bag.  Do not mix the chemicals.  Look and describe Chemical C.  Record your observations in the spaces provided below. Observations may include the colour or state of each chemical. Add a photograph of each Chemical in second row below.

 

Chemical A (Sodium bicarbonate) Chemical B (Calcium chloride) Chemical C (Bromothymol blue)
Looks like a white powder. They are not transparent. The bag weighed 11.15 grams

 

 

 

 

 The chemical looks a lot like white rock candies. They are solid and are not transparent. The bag with the two chemicals weighed 11.5 grams. It is a blue liquid. It is stored inside a glass bottle, that seems to have been stained blue on the inside by the liquid. The mixture of chemicals inside the bag weighed about 11.58

 

  1. Mix Chemical A with Chemical B in the ziplock bag. Record observations.  Add 10 mL of chemical C into a plastic bag.  QUICKLY remove as much air as possible and then seal it up.
  2. In the first 30 seconds, squeeze the bag in various places to mix the chemicals.
  3. Detect any temperature changes with your hand.
  4. Record as many observations as you can. After 2 minutes record any new observations.
  5. Add at least two photographs of your ziplock bag.

 

 

 

 

Observations:

 

Chemical A has seemed to simply coat chemical B in the white powder.

Once I added chemical C, it looked like a virus infecting an organ system. Chemical C made contact with Chemical A and B, then the white powder slowly turned yellow. The temperature changed and seemed somewhat warm in my hands as the reaction was taking place.

 

 
PHOTGRAPHS
  1. When you are finished, wash all the chemicals down the drain and rinse out the plastic bag.
  2. What evidence of chemical change did you observe in the bag? What physical changes did you see?

I didn’t see any type of physical change, but the powder did turn yellow when it made contact with the blue chemical.

 

 

POST THIS LAB ON YOUR EDUBLOG

BE SURE TO INCLUDE YOUR VIDEO!!