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In conclusion changing the fluid effects the reaction time. My hypothesis was right because the reaction was longer in the seven up.  The reaction lasted longer because the seven up already had the fizzing so when I put in the alka seltzer in the reaction of the fizzing was combine with the fizz from the soda.

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1. measure out 300 ml. of water ( control )
2. drop one whole alka seltzer tablet in the 300 ml. of water.
3. time the reaction
4. repeat steps 1-3 , 3 times
5. average your times
6. measure out 300 ml. of seven up ( variable )
7. drop one whole alka seltzer tablet in the 300 ml. of seven up
8. time the reaction
9. repeat steps 6-8
10. average your times
11. make a data table
12. graph your results

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If I put alka seltzer in water and put alka seltzer in seven up then the rate of reaction will be shorter in water because thing dissolve faster in water.

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A chemical reaction is when two or more molecules interact and the molecules change. A bonds between atoms are broken and become new molecules.A molecule is a group of atoms bonded together. Such as mixing sugar and alka seltzer  and water. In this case would be a solution because the alka seltzer or the solute dissolves into the water or the solvent. And a chemical change would be like baking a cake. A chemical change is when the particles that make up two or more substances are rearranged to to for a new substance. The difference is you can undo a solution but you cannot undo a chemical change. So putting alka seltzer in a solvent it would be a solution because you could undo or separate the solute from the solvent.

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How will changing the fluid affect the rate of reaction?