All categories

3 years ago

A hydrate is determined to be 45.43% water and 54.57% CoCl. Find the chemical formula and name

Chemistry

1 answer:

patriot [66]3 years ago

5 0

Answer:

Chemical formula is CoCl. 3H₂O

Explanation:

Data Given

Percentage of water = 45.43%

Percentage of CoCl. = 54.57%

Chemical Formula of the hydrates = ?

Solution:

First, find the mass of each of the part ( CoCl and water) in 100 g of the Compound.

Mass of CoCl = 28 + 35.5

Mass of CoCl = 63.5

Mass of H₂O = 18 g

Now find how many moles are there for each element in 100 g of compound

So,

The percentage will be count in grams for 100g in compound

Find the moles in total compounds

Formula Used for CoCl

mole of CoCl = mass of CoCl / Molar mass of CoCl

mole of CoCl = mole of 54.57 g / 63.5 g/mol

mole of CoCl = 0.859

Formula Used for H₂O

mole of H₂O = mass of H₂O/ Molar mass ofH₂O

mole of H₂O = 45.43 g / 18 g/mol

mole of H₂O = 2.539

Now

To find the Chemical formula

Divide each one by the smallest number of moles

CoCl = 0.859 / 0.859

CoCl = 1

For H₂O

H₂O = 2.539 / 0.859

H₂O = 3

Multiply the mole fraction to a number to get the whole number.

CoCl = 1

H₂O = 3

So,

The Chemical formula is CoCl. 3H₂O

You might be interested in

Current is applied to a molten mixture of AgF , FeCl2 , and AlBr3 . What is produced at each electrode? STRATEGY Rank the cation

ratelena [41]

Answer:

Cathode: Ag

Anode: Br₂

Explanation:

In the cathode must occur a reduction, so it's more likely to a metal atom be in the cathode. For the metals given the reduction reactions and the potential of reduction are:

Ag⁺ + e⁻ ⇒ Ag⁰ E° = + 0.80 V

Fe⁺² + 2e⁻ ⇒ Fe⁰ E° = - 0.44 V

Al⁺³ + 3e⁻ ⇒ Al⁰ E° = -1.66 V

As the potential for Ag is the higher, the reduction will occur for it first, so in the cathode will produce Ag.

For the anode an oxidation must occurs, so the reactions for the nonmetals are:

F₂ + 2e⁻ ⇒ 2F⁻ E° = +2.87 V

Cl₂ + 2e⁻ ⇒ 2Cl⁻ E° = +1.36 V

Br₂ + 2e⁻ ⇒ 2Br⁻ E° = +1.07 V

For oxidation, the less the E°, the faster the reaction will occur, so Br₂ will be formed in the anode.

5 0

3 years ago

What needs to happen at point 3 for igneous rock to transform into sedimentary rock?

lara [203]

An igneous rock is crushed into little shards of rock called sediment, the sediment is then packed together by other rocks or strong forces, that form together to make a Sedimentary rock.

4 0

2 years ago

Why is acetic anhydride added slowly to a dichloromethane solution of the other reactants?

storchak [24]

Acetic anhydride is the only monocarboxylic acid anhydride which is an acylating agent capable of modifying reactions. The dichloromethane is the reaction solvent.

The acetic anhydride should be added slowly through a separatory funnel to other reactants so as to avoid a runaway reaction, also known as thermal runaway. By doing this the reaction mixture boils as gently as possible while stirring. This phenomenon occurs in situations where an increase in temperature changes the conditions in a way that leads to destructive result brought about by a further increase in temperature.

8 0

3 years ago

Read 2 more answers

Is it possible for two parents displaying a dominant trait to have a child displaying that recessive trait? A. Yes, they always

Kryger [21]

I think the answer is D. Hope it help!

4 0

3 years ago

Read 2 more answers

Air pressures for thunderstorms

aliina [53]

Answer:

Explanation:

The typical baseline reading is done at sea level, where 14.7 pounds of pressure per square inch of air will raise the mercury level to 29.53 inches. Air pressure falls as the elevation rises

please give brainlest tryin to grind

7 0

3 years ago