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Chemistry

Asked by Binita

Why is potassium more reactive than sodium?

Both Potassium and Sodium are highly reactive group 1, meaning they both contain 1 electron in their outer shell. Na has an atomic number of 11. Therefore based on the 2-8-8 rule of electrons Na holds its electrons in 3 shells. With the valence electron being in the third shell. K has an atomic number of 19, meaning it holds its valance electron within the 4th shell. The nucleus of every ato... more

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Gurjeet Cheema
·

211 students helped

Chemistry

Asked by Oliver

In terms of structure and bonding, what are the similarities and differences of copper and graphite

Copper is a better conductor than graphite for electricity due to its lattice structure with free delocalised electrons that can carry the energy across the structure, whilst graphite is still able to conduct electricity, it is not as strong of a conductor as copper. Although copper has a high melting and boiling point, the bonds in copper take less energy to break. Graphite has a very high melt... more

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Hiral Haria
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480 students helped

Chemistry

Asked by Zoey

Hey i am struggling with chemistry and what type of reaction is it when chlorine gas is bubbled into potassium fluoride

This is a reaction test to show the reactive series. If chlorine gas is bubbled into a solution of potassium fluoride no reaction will occur because fluorine is a more powerful halogen than chlorine and is higher in reactivity than chlorine therefore a displacement reaction will not take place.

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Rosina Jojomon
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1.3k students helped

Chemistry

Asked by Matt

1.5 of potassium iodine in 150cm3 of solution

I an assuming you want to work out concentration? If so this would be: 150cm3 = 0.15dm3 1.5/0.15 = 10mol/dm3 When calculating concentrations you must always convert to decimeteres! That is done by dividing by 1000

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Jordan Giannasi
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117 students helped

Chemistry

Asked by Venessa

State and explain the observation made when chlorine gas is burnt in ammonia gas

When ammonia reacts witch chlorine gas you would get ammonium chloride (NH4Cl) which would appear as a white smoke.

Chemistry

Asked by Maryam

Describe a test for ammonium sulfate

Ammonium sulphate (NH₄)₂SO₄ has two ions which need to be tested. NH₄⁺ Test: - Add warm NaOH to a test tube with the solution that is being investigated ((NH₄)₂SO₄) - Above the test tube hold a damp red litmus paper, if the litmus paper turns blue then NH₄⁺ ion is present the litmus paper turns blue as NH3 (alkaline) is produced when ammonium ion reacts with sodium hydroxide. (NH4)2SO4(aq) +2N... more

Chemistry

Asked by Rekha

Three differences between chemical bonds and intermolecular force

Chemical bonds, or intRA molecular forces are within molecules, so for example the covalent bond between H and O in water. Types of these bonds could be ionic, covalent, metallic... IntERmolecular forces are between multiple different molecules, for example between 2 water molecules. This holds the water together. Examples of these would be London dispersion forces (LDF), permanent dipole to perm... more

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Dylan Watt
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121 students helped

Chemistry

Asked by Oliver

In terms of structure and Bonding, explain the similarities and differences of copper and graphite

Copper has metallic bonding which goes throughout the structure, whereas graphite has strong carbon bonds in sheets, but those single-atom-thick sheets have relatively weak electric bonding between them. This means graphite can rub off on objects, in one direction, but is hard to tear apart in other directions. Copper is strong in all directions, but not as strong as carbon-graphite sheets.

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Lewis Johnson
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75 students helped

Chemistry

Asked by catie

If chlorine ges is bubbled into an aqueous solution of potassium iodide and the colourless solution turns brown what is the ionic equation for the reaction that takes place

The reaction is known as the displacement reaction. When chlorine (Cl 2 ) gas is passed through an aqueous solution of potassium iodide (KI), the products formed are solid iodine (I 2) and potassium chloride (KCl). This is a displacement reaction in which the less reactive iodine in potassium iodide is displaced by the more reactive chlorine. The equation can be written as: 2KI(aq)+Cl 2(g)→2KCl(aq... more

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Mukuna Robinson
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292 students helped

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