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1 year ago

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(BONUS QUESTION) In the copper complexes investigated, the water and ammonia molecules act as Lewis bases (electron pair donors)

; they provide both of the electrons that form the covalent bonds between the Cu2+ ion and each ligand. Which ligand (H2O or NH3) is the stronger Lewis base? Explain your answer in terms of your answers for questions 3a and 3b. (hint: the poorer an oxidizing agent a species is, the harder it it to reduce that species. Hint #2: the copper complexes are reduced by gaining an electron.)

1 answer:

chubhunter [2.5K]1 year ago

3 0

Answer and explanation:

Water and ammonia molecules acts as Lewis bases. its is clear from the spectrochemical series that NH₃ has stronger field ligand than water

checked thee attached image for additional solutions

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Sodium carbonate (Na2CO3) is available in very pure form and can be used to standardize acid solutions. What is the molarity of

NeX [460]

Answer:

Molarity of HCl = 0.19 M

Explanation:

Moles of $Na_2CO_3$ :-

Mass = 0.246 g

Molar mass of $Na_2CO_3$ = 105.988 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{0.246\ g}{105.988\ g/mol}$

$Moles_{Na_2CO_3}= 0.002321\ mol$

According to the given reaction:-

$Na_2CO_3+2HCl\rightarrow 2NaCl+H_2O+CO_2$

1 mole of $Na_2CO_3$ react with 2 moles of HCl

0.002321 mole of $Na_2CO_3$ react with 2*0.002321 moles of HCl

Moles of HCl = 0.004642 moles

Given that volume = 24.3 mL

Also,

$1\ mL=10^{-3}\ L$

So, Volume = 24.3 / 1000 L = 0.0243 L

Considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

$Molarity=\frac{0.004642}{0.0243}$

<u>Molarity of HCl = 0.19 M </u>

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7 0

2 years ago

How many particles would be found in a 12.7g sample of ammonium carbonate

Semenov [28]

Answer: The sample of ammonium carbonate contains

0.560 mol NH

4

Explanation:The chemical formula for ammonium carbonate is

(

NH

4

)

2

CO

3

. The formula indicates that in one mole of ammonium carbonate, there are two moles of ammonium ions,

NH

4

4 0

2 years ago

The electron dot structure for CI is

finlep [7]

The correct option is C.
A Lewis dot diagram is a representation of the valence electron of an atom, which uses dot around the symbol of the atom. Chlorine has seven electrons in its outermost shell, these seven electrons are arranged in form of dot around the atom of chlorine. If you count the number of dot given in option C, you will notice that they are seven.

6 0

1 year ago

Read 2 more answers

Dolomite is a mixed carbonate of calcium and magnesium. Calcium and magnesium carbonates both decompose upon heating to produce

Setler79 [48]

Answer:

72.03 %

Explanation:

Total mass of dolomite = 9.66 g

Let the mass of Magnesium carbonate = x g

The mass of calcium carbonate = 9.66 - x g

Calculation of the moles of Magnesium carbonate as:-

Molar mass of Magnesium carbonate = 122.44 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{x\ g}{84.3139\ g/mol}=\frac{x}{84.3139}\ mol$

Calculation of the moles of calcium carbonate as:-

Molar mass of calcium carbonate = 100.0869 g/mol

Thus,

$Moles= \frac{9.66 - x\ g}{100.0869\ g/mol}=\frac{9.66 - x}{100.0869}\ mol$

According to the reaction shown below:-

$MgCO_3\rightarrow MgO+CO_2$

$CaCO_3\rightarrow CaO+CO_2$

In both the cases, the oxides formed from the carbonates in the 1:1 ratio.

So, Moles of MgO = $\frac{x}{84.3139}\ mol$

Molar mass of MgO = 40.3044 g/mol

Thus, Mass = Moles*Molar mass = $\frac{x}{84.3139}\times 40.3044 \ g$

Moles of CaO = $\frac{9.66 - x}{100.0869}\ mol$

Molar mass of CaO = 56.0774 g/mol

Thus, Mass = Moles*Molar mass = $\frac{9.66 - x}{100.0869}\times 56.0774 \ g$

Given that total mass of the oxide = 4.84 g

Thus,

$\frac{x}{84.3139}\times 40.3044 +\frac{9.66 - x}{100.0869}\times 56.0774=4.84$

$\frac{40.3044x}{84.3139}+56.0774\times \frac{-x+9.66}{100.0869}=4.84$

$-694.1618435x+45673.48749\dots =40843.38968\dots$

$x=\frac{4830.09780\dots }{694.1618435}$

$x=6.9582$

Thus, the mass of Magnesium carbonate = 6.9582 g

$\%\ mass=\frac{Mass_{MgCO_3}}{Total\ mass}\times 100$

$\%\ mass=\frac{6.9582}{9.66}\times 100=72.03\ \%$

3 0

1 year ago

A reaction produces a gas, which is collected in a glass cylinder. When a glowing splint is placed inside the container, it burn

Gnesinka [82]

Answer:

true

Explanation:

5 0

2 years ago