Chemistry Questions (3 Viewers)

[girlworld_club]

What instrument could i use to do this? general science question.

Just say i want to cut a piece of liver in equal proportions. How could i do this using school laboratory equipment?
*If you're familiar with liver it is quite hard to handle, it is almost like cutting a very chewy t-bone.

 

[RishadM]

Re: What instrument could i use to do this? general science question.

Scalpel should do

 

[jnney]

Re: What instrument could i use to do this? general science question.

A sharp scalpel - you're not going to get the exact sizes for each piece, maybe not even close - but that's what's available in the laboratory. Maybe you could talk about how the unequal sizes due to the scalpel not being able to produce equal pieces may have affected your results etc. in your discussion.

 

[girlworld_club]

Urgent easy question!

does human error (such as parralax effect accuracy or validity)

 

[someth1ng]

Re: Urgent easy question!

Accuracy.

 

[girlworld_club]

PH chemistry question

Please show full working, i stumbled on this question from a worksheet miss gave me.

20ml of 0.08mol/L is mixed with 30ml of 0.05mol/L. What is the Ph of the solution?

 

[Alkanes]

Re: PH chemistry question

Please show full working, i stumbled on this question from a worksheet miss gave me.

20ml of 0.08mol/L is mixed with 30ml of 0.05mol/L. What is the Ph of the solution?

mole of what solution?

 

[clintmyster]

Re: PH chemistry question

mole of what solution?

Continuing on from this, need to know what's the acid and what's the base.

 

[girlworld_club]

Re: PH chemistry question

20ml of HCL and O.05 of NaOH. Sorry for not stating previously

 

[girlworld_club]

Moles and gas volumes calculation

When 1.0 g of magnesium is dissolved in excess hydrochloric acid, what volume of hydrogen (measured at 0 degrees and 100.00kpa pressure) is formed?

Please show full working. Thanks.

 

[girlworld_club]

Re: really easy chemistry question on moles and volume.

bump. Please this is urgent

 

[Spiritual Being]

Re: really easy chemistry question on moles and volume.

If its so easy, then do it.

 

[Aysce]

Re: really easy chemistry question on moles and volume.

Do you happen to know the answer? I got 0.93L though just checking.

I told myself I wouldn't do work today...

 

[Nws m8]

Re: really easy chemistry question on moles and volume.

 

[girlworld_club]

Re: really easy chemistry question on moles and volume.

yes it's correct, how did you get to your answer?

 

[Nws m8]

Re: really easy chemistry question on moles and volume.

yes it's correct, how did you get to your answer?

Get it?

 

[girlworld_club]

Re: Does anyone have detailed notes on these two experiments.

what is the answer?
A certain solution has ten times more hydrogen ion than another solution of pH = 8. What is the
pH of the more acidic solution?
(A) 0.8
(B) 4
(C) 7
(D) 9

 

[girlworld_club]

What is the OH-(aq) concentration (mol L-1) in a 0.0800 mol L-1 nitric acid solution?
(A) 0
(B) 1.25 x 10-13
(C) 8.00 x 10-12
(D) 1.00 x 10-7

 

[girlworld_club]

Re: Does anyone have detailed notes on these two experiments.

also are these question part of acidic environment, because i saw them in a half yearly paper? (a) At what time was the equilibrium achieved?
(b) State the equilibrium concentration for ammonia.
(c) What is the equilibrium concentration for carbon monoxide if its initial
concentration was 1.6 mol L-1?
(d) Write the equilibrium expression for this reaction.
(e) Determine the value for the equilibrium constant.

 

[albertcamus]

Re: Does anyone have detailed notes on these two experiments.

also are these question part of acidic environment, because i saw them in a half yearly paper? (a) At what time was the equilibrium achieved?
(b) State the equilibrium concentration for ammonia.
(c) What is the equilibrium concentration for carbon monoxide if its initial
concentration was 1.6 mol L-1?
(d) Write the equilibrium expression for this reaction.
(e) Determine the value for the equilibrium constant.

a) Seems like a graph/data based question.
b) Seems like a graph/data based question also - sounds like the Haber Process though, which is in Module 3 (however it could be given as a question regarding LCP - I can't say given what you've said.) But not 100% sure - although I think this is from the option topic Industrial Chemistry.
c) Not 100% sure - but I think this is from the option topic Industrial Chemistry.
d) Not 100% sure - but I think this is from the option topic Industrial Chemistry.
e) Definitely from the option topic Industrial Chemistry.