6.0g of cobolt (II) carbonate was added to 40cm3 of hydrochloric acid, concentration 2.0 mol/dm3. Calculate the maximum yield of cobalt (II) choloride-6-water and show that cobalt (II) carbonate was in excess.

Question

6.0g of cobolt (II) carbonate was added to 40cm3 of hydrochloric acid, concentration 2.0 mol/dm3. Calculate the maximum yield of cobalt (II) choloride-6-water and show that cobalt (II) carbonate was in excess.

CoCO3 +2HCl = CoCl2 +CO2 + H2O
CoCl2 + 6H2O = CoCl2.6H2O

what is the number of HCL moles used?

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4 answers
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Answer 1

MathMate answered
7 years ago

1. Calculate moles of CoCO3

=6.0/(58.933+12.0+3*16.0)
=6.0/118.9
=0.0504 mol

2. Calculate moles of HCl
=40/1000*2.0 mol
=0.080

Using stoiciometric ratios
CoCO3 used = 0.08*1/2=0.04 mols
=> CoCO3 is in excess (<0.0504).

The remaining answer can be obtained by finding the mass of 0.040 mol of CoCl2 and H2O respectively.
[assuming choloride-6-water meant
choloride-&-water]

Answer 2

Clown Bot answered
9 months ago

Well, let's calculate the number of moles of hydrochloric acid used. We can use the formula:

Number of moles = Concentration (mol/dm^3) x Volume (dm^3)

Given that the concentration of hydrochloric acid is 2.0 mol/dm^3 and the volume is 40 cm^3, we need to convert the volume to dm^3:

40 cm^3 = 40/1000 dm^3 = 0.04 dm^3

Now we can calculate the number of moles:

Number of moles = 2.0 mol/dm^3 x 0.04 dm^3 = 0.08 mol

So, the number of moles of hydrochloric acid used is 0.08 mol.

Answer 3

Step-by-Step Bot answered
8 months ago

To calculate the number of hydrochloric acid (HCl) moles used, we need to use the formula:

moles = concentration x volume

Given:

Concentration of HCl = 2.0 mol/dm^3
Volume of HCl = 40 cm^3

First, we need to convert the volume from cm^3 to dm^3:

Volume of HCl = 40 cm^3 = 40/1000 dm^3 = 0.04 dm^3

Now we can calculate the number of moles of HCl used:

moles HCl = concentration x volume
= 2.0 mol/dm^3 x 0.04 dm^3
= 0.08 mol

Therefore, the number of HCl moles used is 0.08 mol.

Answer 4

Explain Bot answered
8 months ago

To find the number of moles of hydrochloric acid (HCl) used, we need to use the given information about the concentration and volume.

Given:
Concentration of HCl = 2.0 mol/dm3
Volume of HCl = 40 cm3

First, let's convert the volume from cm3 to dm3:
1 dm3 = 1000 cm3

40 cm3 = 40/1000 dm3 = 0.04 dm3

Now we can calculate the number of moles of HCl used:

Number of moles of HCl = Concentration of HCl x Volume of HCl

= 2.0 mol/dm3 x 0.04 dm3

= 0.08 moles

Therefore, the number of moles of hydrochloric acid (HCl) used is 0.08 moles.