All categories

3 years ago

Why is it not possible to extract aluminium by heating its ore with carbon?

Chemistry

1 answer:

MAVERICK [17]3 years ago

7 0

Aluminium is higher than carbon in the reactivity series, so aluminium can only be extracted using electrolysis

You might be interested in

Arachidonic acid (5z,8z,11z,14z-eicosatetraenoic acid) is an eicosanoid, a fatty acid containing 20 carbon atoms. it is the prec

aleksley [76]

Below is the structure of Arachidonic acid.

Arachidonic acid contains a chain of 20 carbon atoms. And there are four double bonds in this chain all having cis- Configurations at position 5, 8, 11 and 14 respectively.

5 0

3 years ago

A 50.0 −mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.28×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains

Norma-Jean [14]

When we have Ksp CaSO4 = 9.1x10^-6 so by substitution in Ksp formula:
Ksp CaSO4 = [Ca+2][SO4]
1.9x10^-6 = [Ca+2][1.5x10^-2]
∴ [Ca+2] M in the solution =1.27x10^-4
when percent remaining = [Ca in solution]/[C original value] * 100
= [(1.27x10^-4*(50ml+50ml)]/[1.28x10^-2*50ml]*100
≈ 2%

4 0

4 years ago

Find [cu2+] in a solution saturated with cu4(oh)6(so4) if [oh − ] is fixed at 2.3 ✕ 10−6 m. note that cu4(oh)6(so4) gives 1 mol

ki77a [65]

$Cu_4(OH)_6(SO_4)$

You have OH- conc = 2.3 ✕ 10−6 m
From the formula, you can observe the ratio of Cu2+ to OH- is 4 : 6 = 2:3

So, for 2.3 ✕ 10−6 m OH-
[Cu2+] = $\frac{2}{3} \times 2.3 \times 10^{-6}$

$= 1.53 \times 10^{-6} 
$

6 0

4 years ago

How does an atom of tellerium become an ion.

ANEK [815]

Answer: Element Tellurium (Te), Group 16, Atomic Number 52, p-block, Mass 127.60. ... defined as being the charge that an atom would have if all bonds were ionic.

What ion does tellurium form?

Te+4

Tellurium, ion (Te4+) | Te+4 - PubChem.

Explanation: Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid.

Tellurium

Tellurium Element - Visual Elements Periodic Table

Discovery date 1783

Discovered by Franz-Joseph Müller von Reichenstein

Origin of the name The name is derived from the Latin 'tellus', meaning Earth.

Allotropes

Tellurium

52127.60

Fact box

Group 16 Melting point 449.51°C, 841.12°F, 722.66 K

Period 5 Boiling point 988°C, 1810°F, 1261 K

Block p Density (g cm−3) 6.232

Atomic number 52 Relative atomic mass 127.60

State at 20°C Solid Key isotopes 130Te

Electron configuration [Kr] 4d105s25p4 CAS number 13494-80-9

ChemSpider ID 4885717 ChemSpider is a free chemical structure database

8 0

3 years ago

Compare strontium with rubidium in terms of the following properties:

Ilya [14]

Answer:

Strontium is smaller

Strontium has the higher ionization energy

Strontium has more valence electrons

Explanation:

It must be understood that both elements belong to the same period i.e the same horizontal band of the periodic table

While Rubidium is an alkali metal(group 1) while Strontium is an alkali earth metal(group 2)

Since they are in the same period, periodic trends would be useful in evaluating their properties

In terms of atomic radius, rubidium is larger meaning it has a bigger atomic size

Generally, across the periodic table, atomic radius is expected to decrease and thus Rubidium which is leftmost is expected to have the higher atomic radius

Since strontium belongs to group 2 of the periodic table, it has 2 valence electrons which is more than the single valence electron that rubidium which is in group 1 has

In terms of ionization energy, the atom with the higher number of valence electrons will have the higher ionization energy which is strontium in this case

6 0

4 years ago