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Ganezh [65]
3 years ago
5

in a particular redox reaction, Cr is oxidized to CrO42- and Ag+ is reduced to Ag. Complete and balance the equation for this re

action in acidic solution.
Chemistry
2 answers:
Leviafan [203]3 years ago
8 0

Answer:

The complete and balance the equation for this reaction in acidic solution is given by:

Cr+4H_2O+6Ag^+\rightarrow CrO_4^{2-}+8H^++6Ag

Explanation:

Oxidation reaction of chromium to chromate in acidic medium:

Cr\rightarrow CrO_4^{2-}

Add 4 molecules of water on the left hand side to balance the oxygen:

Cr+4H_2O\rightarrow CrO_4^{2-}

Now balance hydrogen atoms by adding hydrogen ions on opposite to the side where water molecule are present .

Cr+4H_2O\rightarrow CrO_4^{2-}+8H^+6e^-....[1]

In last, to balance the charge on the both sides add electrons to sides where positive charge is more.

Reduction reaction of silver ions to silver in acidic medium:

Ag^++e^-\rightarrow Ag..[2]

By [1] + 6 × [2] , we will get the balance equation for this reaction in acidic solution:

Cr+4H_2O+6Ag^++6e^-\rightarrow CrO_4^{2-}+8H^+6e^-+6Ag

Cr+4H_2O+6Ag^+\rightarrow CrO_4^{2-}+8H^++6Ag

Gwar [14]3 years ago
7 0
Cro42ag What is the percent for the fraction nine twentieths? 1. 9% 2. 20% 3. 45% 4. 90%
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Draw all resonance structures for the nitryl fluoride molecule, no2f.
denis-greek [22]
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       F
 ..    I    ..
: O : N :O: 
 
              ..
     OR  : F:
              I                             

             N                                                  ..                                                                                                                                    : F:

          /         \                        or                   I

   ..                 ..                                               N

:O  :            :O:                                       / /        \\
                                                            / /               \\
                                                         :O :            :  O:
7 0
4 years ago
Aqueous hydrochloric acid (HCl) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium chloride (NaCl) and liquid w
Naddika [18.5K]

Answer:

87.9 % is the percent yield of H₂O

Explanation:

This is the neutralization reaction. A base reacts with an acid to produce water and the correspondly ionic salt.

NaOH  +  HCl  → NaCl +  H₂O

As we have the mass of the two reactants, we must determine the limiting reactant.

Let's convert to moles, the mass of each reactant. (mass / molar mass)

21.1 g / 36.45 g/mol = 0.579 moles of HCl

46.3 g / 40g/mol = 1.15 moles of NaOH

Ratio is 1:1, so it is obviously that the limiting reactant is the HCl. For 1.15 moles of NaOH, i need the same amount of acid, but I only have 0.579 moles

Let's work with the products now. Ratio is 1:1 again, so If I have 0.579 moles of acid, I can produce 0.579 moles of H₂O.

How many grams are 0.579 moles of water? We should find it out as this

mol . molar mass = mass → 0.579 mol . 18 g/mol = 10.4 g

We were told that the production of water was 9.17 g, so let's determine the percent yield as this:

(Yield produced / Theoretical yield) . 100 =

(9.17 g / 10.4g ) . 100 = 87.9 %

6 0
4 years ago
What is the molarity of 1 mole of HCl in 5 liters of solution?
kicyunya [14]
Molarity = moles of solute(HCl)
                  ------------------------------------
                   volume of the solution
               
                =   1
                    ------
                     5 
               
                =  0.2M.

Hence option B is correct.
Hope this helps!!
5 0
3 years ago
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Ray Of Light [21]

Answer:

Explanation:

Kory goes outside to grill some hamburgers. He tells Ethan that when you cook meat, a chemical reation is taking place. Ethan says "That's perpostrous!" Is Kory Correct??

absolutely Kory is correct

evidence of a chemical reaction are

new odor and or taste

change in color

signs of bubbling

direct effect of temperature on rate of change

evidence of a new substance being formed

we observe all these when we grill meat.

7 0
3 years ago
How do scientists predict the polarity of molecules, the distribution of non-polar and polar molecules?
EastWind [94]

Answer:

Explanation:

Polar molecules interact with other molecules of similar polarity to form solutions. Non-polar molecules do not interact the same way.

8 0
3 years ago
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