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3 years ago

What other means of qualitative analysis are used to identify metals

Chemistry

2 answers:

NNADVOKAT [17]3 years ago

5 0

Answer:

Precipitation, visible-evidenced redox reactions and complexation reactions are used to identify metals.

Explanation:

Hello,

In this case, since you are talking about qualitative analysis, several techniques such as precipitation, visible-evidenced redox reactions and complexation reactions are suitable to identify metals. Such reactions are good enough as long as depending on the metals' cation, it precipitate, redox behavior and complexation will produce a particular color that will allow the identification of the metal.

For instance, to determine the presence of silver, a white precipitate is obtained when chloride ions are placed into a silver-containing sample. The presence of cobalt is substantiated via the formation of a yellowish-brown ionic complex of hexamminecobaltae (II).

Best regards.

Masja [62]3 years ago

3 0

<span>Figure out the density. every metal has it's own. just fill a glass up to the top with water, and then carefully put the metal in. measure how much water is displaced (either by collecting the water or by measuring the glass afterwards),
then you will have the substance's density, because you have volume and it's measurement. </span>

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Interpret the following equation for a chemical reaction using the coefficients given:

Liono4ka [1.6K]

Answer: 1 molecule of $H_2$ reacts with 1 molecule of $Cl_2$ to give 2 molecules of HCl.

1 mole of $H_2$ reacts with 1 mole of $Cl_2$ to give 2 moles of HCl.

Explanation:

The given balanced reaction is:

$H_2(g)+Cl_2(g)\rightarrow 2HCl(g)$

On the particulate level :

1 molecule of $H_2$ reacts with 1 molecule of $Cl_2$ to give 2 molecules of HCl.

On molar level:

1 mole of $H_2$ reacts with 1 mole of $Cl_2$ to give 2 moles of HCl.

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3 years ago

1. How are atoms held together? What is the attraction between?

barxatty [35]

Answer:

the atom is held together by the electrostatic attraction between the positively charged nucleus and the negatively charged electrons surrounding it, the stability within chemical bonds is also due to electrostatic attractions.

Explanation:

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3 years ago

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As you move from left to right across the periodic table, each element has one more ________ than the element before it. questio

mylen [45]

The answer should be 2) electrons.

The elements in the periodic table are arranged by increasing atomic number, which is also the number of protons in an element. For example, Carbon has 6 protons, it is the sixth element on the table. While Nitrogen, which has 7 protons, is after Carbon.

In atoms, the number of protons equals to the number of electrons too, if the number of electrons does not equal to the number of protons, the substance is no longer atom, but ion. So, the answer to this is 2) electrons, as the elements on the table is arranged according to increasing atomic numbers.

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3 years ago

The pressure exerted by a gas in a container depends on what?

lyudmila [28]

Answer:

From gas laws (pressure law and Boyles law), the pressure exerted by a gas depends on Temperature of the gas and volume of the container.

Explanation:

${ \boxed{ \rm{P \: \alpha \: \frac{T}{V} }}}$

• P → Pressure exerted by the gas.

• T → Temperature of the gas.

• V → Volume of the container.

• from the expression, pressure exerted by the gas is directly proportional to temperature of the gas and inversely proportional to the volume of the container.