Investigating Temperature Change when Different Volumes of Acid and Alkali are Mixed
Prediction
==========
My prediction is that the biggest temperature change will be when
there are equal amounts of H+ ions and OH-, this is because create an
optimum mixture for the ions to neutralise each other.
Apparatus
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v Empty plastic yoghurt cup
v thermometer
v Hydrochloric Acid
v Sodium Hydroxide
v Two measuring cylinders
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Diagram
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[IMAGE] 30ml³ Hydrochloric acid
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[IMAGE]Thermometer
[IMAGE][IMAGE] Measuring Cylinder
[IMAGE] Plastic cup
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30ml³ Sodium
Hydroxide
Method
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First of all we decided to use a plastic cup because it was easy to
wash off the mixture. We poured out 30ml of Hydrochloric acid in to
one measuring cylinder and poured 30ml of Sodium Hydroxide into the
other measuring cylinder. Then we added the Sodium Hydroxide to the
plastic cup and left it for 25-30 seconds, we then took the
temperature of the alkali before adding the acid. We then tipped the
Hydrochloric acid into the cup with the alkali. We stirred the cup for
25-30 seconds and then recorded the new temperature, and then we
washed out the mixture before doing the next experiment. We then tried
out different combinations- 40:20, 20:40, 15:45 and 45:15. Just to
make sure we had reliable results we carried out the experiment twice
and took an average from the two results.
Results Table
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1st Results
Chemicals + Measurements
Temperature
[IMAGE]30ml³ of Sodium Hydroxide
+
30ml³ of Hydrochloric Acid
Start
20ºC
End
26ºC
Rise
6ºC
[IMAGE]40ml³ of Sodium Hydroxide
+
20ml³ of Hydrochloric Acid
Start
20ºC
End
27ºC
Rise
7ºC
[IMAGE]20ml³ of Sodium Hydroxide
The Yeti Rambler has taken off where it’s more expensive and luxurious brethren, the Yeti cooler, has left off. The explosion of demand for this particular cup is due to its highly engineered design, which features 18/8 stainless steel material and a double walled vacuum insulation, which keeps a drink hot or cold twice as long as plastic cups (“Frequently asked questions”, n.d.). The cutting edge cup also features a gasket lid that locks beverages inside of the cup, allowing one to move freely without fear of spilling (“Frequently asked questions”, n.d.). Saporito (2016) narrates the Yeti Coolers story as it was started in 2005 by Ryan Seiders and his brother Roy Seiders as a way to provide premium coolers
The advantages of adding a fully sealable lid to our cups includes minimizing the risk of spilling the cup’s contents, as well as this lid has the potential to keep liquids at their desired temperature for longer due to the absence of outside elements constantly entering the cup. One disadvantage to making this fully sealable lid is that some of YETI’s main competitors already have this option available to our customers, so YETI would not be a first mover for this niche market as we have been in the past. But since this product already exists in competitor product lines, the introduction of a fully sealable lid to YETI products is sure to help YETI become more competitive, which results in higher sales and profit. A potential threat to this new product is that YETI will almost certainly charge more for their product, even though the product already exists on the
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coffee into the cup for Alicia, and sets it on a small table in front of her.
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After choosing the flavor that best suits your taste buds, the second step is making sure that your kitchen houses some necessary equipment for making the Kool-Aid. Find a two-quart pitcher. Plastic is nice, but glass pitchers allow the liquid to shine through and add festive coloration to any refrigerator shelf. Next, find a long-handled wooden spoon, a one-cup measuring cup, a water faucet that spouts drinkable water, usable white sugar, and an ice cube tray full of ice. Then, you are ready to mix.
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