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In a titration, 45.0 cm^(3) of 0.100 mol dm^(-3) sodium hydroxide solution is exactly neutralised by 40.0 cm^(3) of a dilute hydrochloric acid solution. Calculate the concentration of the hydrochloric acid solution in mol dm^(-3).

First of all, summarise everything that you know in a table or in brief notes:NaOH, 45 cm^(3), 0.1 mol dm^(-3)HCl, 40 cm^(3)The first thing that you need to do is to find the number of moles of NaOH. This...

LJ
Answered by Lauren J. • Chemistry tutor
5159 Views

Explain the differences between neuronal and hormonal communication and give an example of each.

Neuronal signals are often transmitted over a relatively short distance and over a short period of time. Due to pathways of neurons these signals can be incredibly specific, coming from one stimulus and b...

PD
Answered by Peter D. • Biology tutor
8005 Views

How to complete the square to solve quadratic equations?

Equation: x2 +4x-5=0 (This is in the form ax2+2bx+c=0)First divide 2b by 2 (4/2=2)Then put this into (x+b)2-(b)2+c=0This gives: (x+2)2-(2)2

GJ
Answered by George J. • Maths tutor
2743 Views

How accurate is it to say that it was the interest taken by James VI that accounts for the extent of witchcraft persecutions in Scotland in the years 1590-97?

James VI had a strong interest in witchcraft during the early part of his reign; as evidenced by his involvement in witch trials during the 1590s and the book he published on witchcraft, “Deamonology<...

HK
Answered by Hannah K. • History tutor
8139 Views

Practice question - How significant were the differences between the Northern and Southern states c1845? [25 marks]

Think about how to approach the question and from there think about how to structure it. Split points into differences which were significant and those that were not along with any similarities. Try to gr...

BC
Answered by Ben C. • History tutor
3512 Views

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