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3 years ago

Calcium chloride forms an ionic solid. how are the particles held together and arranged in the solid

Chemistry

2 answers:

Advocard [28]3 years ago

7 0

Calcium chloride forms an ionic compound with a regularly arranged lattice of oppositely charged ions.

The Na+ and Cl- ions are held together by strong electrostatic forces.

Hope that helps

Ymorist [56]3 years ago

4 0

Explanation:

As we known that an ionic solid is a solid whose atoms chemically combine together by transfer of electrons from one atom to another.

For example, $CaCl_{2}$ is an ionic solid because transfer of electrons take place from calcium to chlorine.

As a result, calcium atom has a partial positive change and chlorine atom has a partial negative charge. Hence, there will be strong intermolecular forces of attraction between the two because opposite charges attract each other.

Therefore, particles will be arranged in a regular crystal lattice of opposite charges.

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The atomic weight of iodine is less than the atomic weight of tellurium. However, Mendeleev listed iodine after tellurium in his

QveST [7]

Explanation :

As we know that Mendeleev arranged the elements in horizontal rows and vertical columns of a table in order of their increasing relative atomic weights.

He placed the elements with similar nature in the same group.

According to the question, the atomic weight of iodine is less than the atomic weight of tellurium. So according to this, iodine should be placed before tellurium in Mendeleev's tables. But Mendeleev placed iodine after tellurium in his original periodic table.

However, iodine has similar chemical properties to chlorine and bromine. So, in order to make iodine queue up with chlorine and bromine in his periodic table, Mendeleev exchanged the positions of iodine and tellurium.

As we know that the positions of iodine and tellurium were reversed in Mendeleev's table because iodine has one naturally occurring isotope that is iodine-127 and tellurium isotopes are tellurium-128 and tellurium-130.

Due to high relative abundance of tellurium isotopes gives tellurium the greater relative atomic mass.

3 0

3 years ago

Given the following balanced equation, determine the rate of reaction with respect to [Cl2]. If the rate of Cl2 loss is 4.44 × 1

PolarNik [594]

Answer:

8.88 x 10⁻² M/s

Explanation:

The rate of reaction for:

NO(g) + Cl₂ (g) ⇒ 2NOCl(g)

is rate = -ΔNO/Δt = -ΔCl2/Δt = 1/2 ΔNOCl/Δt

so ΔNOCl/Δt = 2 ΔCl2/Δt = 2 x 4.44 × 10⁻² M/s = 8.88 x 10⁻² M/s

In general given a reaction

aA + bB ⇒ cC + dD

rate = -1/a ΔA/Δt = -1/b ΔB/Δt = 1/c ΔC/Δt = 1/d ΔD/Δt

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3 years ago

For dessert, she prepares to bake a delicious apple pie. During one of the steps, she

Leno4ka [110]

Answer:

heating the sugar

Explanation:

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3 years ago

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A sample of ethanol has a volume of 7.5 mL and a mass of 5.85 g. A sample of benzene also has a volume of 7.5 ml,

AysviL [449]

Answer:

Benzene

Explanation:

You need to calculate the densities for each compound.

EtOH = 5.85/7.5 = 0.78 g/mL

Benzene = 6.60/7.5 = 0.88 g/mL

0.88 > 0.78, thus benzene is denser than ethanol.

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3 years ago

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The hydrolysis of ethyl acetate in alkaline conditions yields acetate ion and ethanol. The rate of the reaction increases 6.37 t

sweet [91]

Answer:

Explanation:

Hydrolysis is a chemical decomposition involving breaking of a bond and the addition of elements

of water. In this hydrolysis of ester (ethyl acetate) with an alkali (sodium hydroxide), HCl was

used as catalyst to accelerate it. 1ml and 2ml of ethyl acetate was injected separately into the

500ml reactor vessels which contains 0.05N of NaOH and thoroughly mixed. At regular time

interval, 0, 10, 20, 30, 40, and 90 minutes, 25ml of each of the samples were withdrawn into a

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was faster than that of the 2ml ethyl acetate, indicating that the higher the concentration the faster

the rate of reaction. The rate constant after evaluation from the graphs was approximately

0.003min-1

cm-3

for the 1ml and 2ml ethyl acetate, signifying that while the r

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3 years ago