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25cm3 NaOH was titrated with 0.05mol dm-3 HCl. 21.5m3 of HCl neutralised 25cm3 of NaOH. What is the concentration of NaOH in mol dm-3?

NaOH + HCl --> NaCl + H2O 1 : 1 : 1 moles (mol) = concentration (mol dm-3) x volume (dm3)

BA
Answered by Britta A. Chemistry tutor
5666 Views

When should I use "tu" and when should I use "vous"?

Unlike in English, there are two ways of saying "you" in French.Most of the time, when talking to someone, you will use "tu". This is normally used when talking to fr...

JB
Answered by James B. French tutor
2007 Views

How to analyse a poem?

When analysing a poem, I find that using the method ‘SMILE’ is very helpful. SMILE stands for:S - StructureM - MeaningI - ImageryL - LanguageE - Effect When looking at a poem, you should always try to fin...

GV
3733 Views

Expand (t+5)(t-2)

FOIL stands for First,Outer,Inner and Last. This is the order of multiplying the terms from each set of brackets.First terms give: t x t=t2Outer terms give: t x -2=-2tInner terms give: 5 x t=5t...

OS
Answered by Ollie S. Maths tutor
4317 Views

solve this simultaneous equation: 4x+ y = 12 , 2x+ y = 8

 4x+ y = 12 , 2x+ y = 81) find the unknown (either x or y) that has the same coefficient. - In this example it is y2) Take away the equations from one another so you only have 1 unknown - 2x = 43) Divide ...

NS
Answered by Natasha S. Maths tutor
3339 Views

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