Cold+Pack+Experiment

So cool... || The reasons the thing went cold was because of the bicarb is high on the ph 7 and the citric is lower than ph7 and thats what i think makes it cold || I think the product turned cold because bi carb soda loves to steal hydrogen ions and citric acid loves to give it away. I also think that it turned cold because of the different PH levels. || The Products turned cold because of when a Acid and a base are mixed together they do nothing but when a liquid is added then it reacts to the liquid. ||
 * || Chen Yee || Mikayla || Izzy || India ||
 * What were the main things you observed during the experiment?  || First when we put citric acid and bi-Carb soda in the zip-lock plastic bag nothing happen but when we added water in it started to bubble up and then if you sealed the zip-lock it will fill the packet with air if you don’t quickly unzip it the cold packet will explode like really small ones that was fun. Then it turned colder and colder, if you waited awhile without touching the cold pack the liquid inside will turn hard. || the main things that happen when was we added the dry mix it felt a little cold when we added the water it very cold and when we zipped up the zip-lock bag it went fizzy. ||  The first thing I noticed was that when the citric acid and the bi carb soda were added together nothing happened but when the water was also added it started to fizz and then it grew colder and colder and if you closed the bag it would puff up so you had to quickly undo it before it exploded.  || The Main things that i observed were all the bubbles and Fizziness. The bag also blew up and went very tight and it felt like it was going to pop! I also observed that it smelt pretty Nice but it didn’t taste very nice! :) ||
 * What is the chemical difference between Citric Acid and Bicarb Soda?  || Bi-Carb soda is what we call base that means when it is mixed in water, it dissolves to make solution that has over a ph over 7. Well that basically means the chemical inside Bi-Carb soda steals hydrogen ions. Well citric acid is an acid which if you mix it with water it has ph less than 7 which is why we call it and acid. Which technically give hydrogen ions away. || the chemical  difference between Citric Acid and Bicarb Soda is that the bicarb is higher than the ph 7 and the citric acid   ||  I think the chemical difference is the PH level. The citric acid has a PH level below 7 and the bi carb soda has a PH level above 7.  || The Difference was that Citric Acid has a under 7 PH level but Bicarb soda has a rating over 7. 7 is the neutral rating for the PH Levels. ||
 * Why did the product turn cold?  || Well this is an endothermic reaction. Why does it feel cold? Well mostly chemical reaction needs energy to perform. Sometimes they have more energy than they use and then it get release it into the environments. Anyway in this case, the chemical reaction takes the energy around them that they need, sucking all the heat away and lock it away as chemical bonds and if you touch it, it feel cold and the heat goes in and if your touching the cold pack it is also taking the heat away from the fingers.
 * Name one scientific fact you learnt.  || Well I learned that what you call endothermic reaction takes the heat away with only three ingredients’ and I learned more about chemical I’m sure everyone did too. || learnt about the ph scale and how to make a cold pack  ||  I learnt what PH means when used in chemistry.

I also learnt how to make a cold pack. || I learnt that when you mix a Base with a Acid then add water it makes a extremely affective reaction. ||