Cold+Pack+Experiment

Citric acid is the opposite of bycarbsoda it releases hydrogen ions. With the ph scale 7 is neutral bicarbsoda is the base so it is over seven. Where citric acid is under seven. ||  ||
 * || Kyle || Jack || Jak || Harry ||
 * What were the main things you observed during the experiment? ||  ||   || I observed the bubbling and how it made gas and how it got really cold by sucking the heat out of everything and turning it into cold air. I like listening to the crackly sound it made and feeling the gooey stuff inside it. I watched it get bigger and bigger like it was climbing up the bag and fell back down. || Well when you add the water to the bicarb and citric acid it bubbles up and if you close the zip lock bag it will expanded it was really cold  ||
 * What is the chemical difference between Citric Acid and Bicarb Soda? ||  ||   || bicarbsoda is a chemical that when it is mixed with water it starts to steal hydrogen ions.
 * Why did the product turn cold? ||  ||   ||  Because when citric acid and bycarbsoda and water are mixed together they started to release air which made the bag puff up. But it got cold because a reaction started and the liquid started taking the heat away from everything and turning it to cold air.  || it got cold because the liquid was taking away the heat from everthing and turned it to cold air. ||
 * Name one scientific fact you learnt. ||  ||   || I leant about the ph scale and how to make an ice pack and how 7 is neutral and if the stuff is under seven it release hydrogen ions. But if it’s over it steals them, I leant about the different strengths of acid. || i learnt 7 is neutral with ph ||


 * || Ethan || Levi ||
 * What were the main things you observed during the experiment? || The sandwich bag expanded and would have popped if you didn’t let air out. it was extremely fizzy || The main things I learnt during the experiment was that it’s cold obviously and it fizzes up and in the plastic bag it fills up with air and unless you open the bag it will probably explode ||
 * What is the chemical difference between Citric Acid and Bicarb Soda? || One is a base which has high ph and the other an acid which has low ph which makes them different acidity. || Well the difference between the citrus and the Bicarb soda is that one is an Acid and the other one is base and the only way you can get a reaction is to mix both them together but you can’t get a reaction with one. ||
 * Why did the product turn cold? || The chemicals reacting took away the heat, leaving the air cold, resulting in a cold slime inside a sandwich bag. || The way it gets cold is the chemical reactions need energy to occur. Sometimes they produce more energy than the use and release it into the environment. In the case the reaction takes the energy it needs from the surroundings talking the heat away and locking it away as a chemical ||
 * Name one scientific fact you learnt. || I learnt that 7 is neutral with ph. || When you mix both together you get a reactions and I didn’t know that it would keep expanding and getting bigger ||