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Describe and explain the trend in boiling points in the first four hydrogen halides

HF has the highest boiling point this is followed by HI, then HBr with HCl having the lowest boiling point of the four molecules. This is because HF is able to form Hydrogen bonds whereas the other three mol...
TM
Answered by Theo M. • Chemistry tutor
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What 2 reagents are required to form NO2+ (state conditions)? Write an equation for this reaction.

Concentrated sulphuric acid (H 2 SO 4 ) and concentrated nitric acid (HNO 3 ).H 2 SO 4 + HNO 3 -> HSO 4 - + H 2 NO 3 + H 2 NO 3 + <-> (equilibrium arrow, do not penalise if normal arrow used ) H 2 O...
EC
Answered by Eleanor C. • Chemistry tutor
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How can potassium form an ionic compound with sulphur?

An ionic compound is formed from positive and negative ions which have balanced and opposite charges.K has 1 electron in it's outer shell. S has 6 electrons in it's outer shell. S needs 2 more electrons to f...
MT
Answered by Molly T. • Chemistry tutor
5276 Views

Explain why diamond cannot conduct electricity but graphite can.

In the atomic structure of diamond, each carbon is bonded to four other carbons using all of its outer electrons, leaving none free to carry a charge. In graphite not all of the electrons are used in bonding...
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Answered by Lucy B. • Chemistry tutor
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The rate of the reaction between magnesium ribbon and hydrochloric acid can be increased by increasing the concentration of the acid. State two other ways of increasing the rate of this reaction

Increase the surface area of the magnesium, for example by using a powder.Increase the temperature of the reaction.Add a catalyst
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Answered by Aleks H. • Chemistry tutor
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