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20cm3 of 0.5moldm-3 of HCL is diluted by adding 15cm3 of water. This diluted solution is titrated against a 0.3moldm-3 solution of NaOH. What is the volume of the NaOH in cm3 required to reach the endpoint of the titration?

We need to calculate how many moles of HCl are being titrated. This is the volume in dm3 times the concentration (trick: you can do dimensional analysis if unsure of the formula): number of moles of HCl = 0....
Answered by • Chemistry tutor
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Explain the trend in reactivity along period 3 of the periodic table?

As you move from left to right along period 3 (from K to Kr) the amount of protons in the nucleus increases therefore proton density increases. Shielding stays the same as it remains in the same electron orb...
CM
Answered by Caitlin M. • Chemistry tutor
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The enthalpy change for the forward reaction is -92kJ/mol. State and explain how the value of Kp would change if the temperature was increased.

The value of Kp would decrease.Using Le Chatelier's principle the position of equilibrium would shift so as to oppose the change.The endothermic (backward) reaction would therefore be favoured in order to re...
FM
Answered by Fin M. • Chemistry tutor
4812 Views

Give and explain 2 of the anomalous properties of ice caused by hydrogen bonding

Compared to water ice is less dense this is due to hydrogen bonds in the open lattice holding the H 2 O molecules apart whereas in liquid form the hydrogen bonds break allowing the molecules of water to be c...
MT
Answered by Morgan T. • Chemistry tutor
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What flame test colours are produced by lithium and barium?

Lithium - Bright Red/Scarlet Barium - Apple green
EJ
Answered by Ellie J. • Chemistry tutor
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