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Chemistry
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Why do transition metals form coloured solutions?

White light is a mixture of different colours of light (e.g red, green and blue) and each colour has a different wavelength. For something to have colour, it needs to absorb certain wavelengths...

Answered by Yusuf B. Chemistry tutor
10777 Views

Why in a strong acid and strong bases reaction, a drop of acid added would not change its PH dramatically but has a big drop near the equivalent point?

PH scal is a logarithmic scale which means PH 3 is10 times more concentrated in hydrogen ions then PH4. PH scale is therefore the negative of hydrogen concentration. Now When a drop of atrong acid, eve...

Answered by Grace X. Chemistry tutor
3696 Views

Explain why chlorine (Cl2) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature.

The melting/boiling point of a substance determines what state of matter it takes at a certain temperature.

In Cl2 there are covalent bonds between the atoms forming simple molecules. The...

Answered by Lily W. Chemistry tutor
164045 Views

At what temperature does the reaction become feasible? When ΔH = 492.7 kJmol^-1 and ΔS = 542.6 JK^-1mol^-1.

When a reaction is feasible ΔG = 0. Rearrange the equation ΔG = ΔH - TΔS. So that when ΔG = 0,       T = ΔH / ΔS.

Must convert ΔS from JK^-1mol^-1 to ...

Answered by Lily W. Chemistry tutor
17905 Views

How is the electrophile formed for the nitration of benzene??

React concentrated sulfuric acid with concentrated nitric acid in the below reaction to yield the nitronium ion.

HNO3  + 2H2SO4   --> NO<...

Answered by Jessie D. Chemistry tutor
4728 Views

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