help can someone check this:

1) 25.0cm³ of NaOH is neutralized by 150 cm³ of HCl acid of concentration of 0.25 mol dm⁻³. Find the concentration of the sodium hydroxide solution (NaOH).

Working out:
NaOH + HCl
1:1

NaOH = concentration? Volume=25.ocm³ mole?

HCl = concentration=0.25 Volume=150cm³ mole?

N=C × Vcm³/1000 = 150÷1000=0.15

Mol = C × V =0.15×0.25=0.375
As the relationship between NaOH & HCl is 1:1 the number of moles would be the same.
Concentration = M÷ V
25÷1000= 0.025
0.0375÷0.025=1.5

0

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2

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Anonymous

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Anonymous

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Find a quiet place to study and make sure you are sitting comfortably
Make sure your desk is well lit
Keep background noise to a minimum
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Have everything you need to do your revision to hand before you start

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1

Mind maps help to cram all the topic info onto one page, can be colorful and include funny pictures to jog your memory, and can be really fun to do. Also try doing a "perfect" mind map and then getting a blank piece of paper and copy it out without looking at it and see how much u remember. Anything u don't remember, try to remember next time. Hope that helped! :)

Anonymous

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