Question

plz answer

Answer 1

a) Write a procedure that would follow to demonstrate the effect of increasingly higher concentrations of hydrochloric acid on its rate of reaction with antacid tablets. Can only use materials listed:
- Hydrochloric acid (with a concentration of 1.0 mol/L)
- Distilled water
- Antacid tablets (calcium carbonate)
- A mortar and pestle
- Graduated cylinders (10 mL, 100 mL sizes)
- Test tubes and beakers
- Balance and measuring pan
- Hot plate (heat source)
- Thermometer
- Stopwatch or other timing device
- Ice-water bath
- Scoop

b) Design a table (giving headings only) for your observations.

c) Describe and explain three safety procedures you would have to follow when performing your procedure in a laboratory setting.

d) For the procedure that you designed in part (a), describe three different controls you used.

Answer 2

That's a lot.

Answer 3

well i just need part a

Answer 4

The longest part.

Answer 5

Ok, well, first of all, you need to know how is it that concentration affects the chemical reaction we're talking about here. If you're referring to a chemical system at equilibrium, you can apply le'chatliers principle.

Obviously, if you increase the concentration of the reactants, you will have more of them to react to product the product. However, higher concentration doesn't always increase the rate of reaction, rather, it reacts more strongly.

Answer 6

So, how might you set up this experiment? Well, start with your initial reaction, maybe set up a few tubes and time the reaction in different tempratures (as you know, temperature is one of the few ways to change K - also solvents)

tube 1 = regular
tube 2 = increase concentration by 2x
tube 3 = increase concentration by 4x
tube 4 = repeat 1 in higher temp
tube 5 = repeat 2 in higher temp

etc., etc...

Answer 7

is this starting to make sense? I'm sure you can think of something with the little info i gave. Also, it might help if you write your expression. It will help you in determining how it will affect the rate, K.

Answer 8

so if I dilute the solution with water lets say:
tube 1:0% amount of solution, 100% water
tube2:25% amount of solution, 75% water
tube 3: 50% amount of solution, 50% water
tube 4: 75% amount of solution, 25% water
tube 5:100% amount of solution, 0% water

would that work?

Answer 9

all heated up at 30 degrees and also one antacid tablet each

Answer 10

using 100ml graduated cylinder test tubes

Answer 11

yes. u have the right idea. see.

Answer 12

only thing is I have to write it up not sure how..

Answer 13

three safety precautions. hmmm not sure

Answer 14

the most obvious safety precautions when you're in a lab! DUH!

Answer 15

i know of two 1)wear safety goggles, wear gloves and protective clothing, 2)add the HCI acid into water and not water into HCI , yet the third.. hmmm

Answer 16

Well, generally, when you're working with concentrated acids, you should work in the fume hood.

Answer 17

but, since you're mixing HCl + water, I don't think it might be necessary after. But when handling it, sure.

Answer 18

i have to close cause they don't want the ask a question as plz answer