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VashaNatasha [74]
3 years ago
13

Without a catalyst, a reaction may require very high temperatures in order to occur. How does a catalyst speed a reaction at low

temperatures? It raises the amount of energy required to break chemical bonds. It lowers the amount of energy required to break chemical bonds. It increases the concentration of the reactant particles. It decreases the concentration of the reactant particles.
Chemistry
2 answers:
Wittaler [7]3 years ago
7 0

It lowers the amount of energy required to break chemical bonds.

Marrrta [24]3 years ago
4 0

The correct answer is "It lowers the amount of energy required to break chemical bonds."

Catalyst work by decreasing the activation energy of a chemical reaction. Activation energy is the minimum energy required to start a chemical reaction. For a chemical reaction to start the bonds in the reactant molecules are broken and new bonds are formed in the product molecules. Thus catalyst facilitate to break chemical bonds in reactants  by lowering the activation energy.

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Elanso [62]

Answer:

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Explanation:

4 0
2 years ago
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A 1.00 L buffer solution is 0.112 M in acetic acid and 0.112 M in sodium acetate. Acetic acid has a pKa of 4.74. What is the pH
topjm [15]

Answer:

ΔpH = 1.25

Explanation:

Using Henderson-Hasselbalch formula:

pH = pka + log [CH₃COONa] / [CH₃COOH]

pH = 4.74 + log [0.112] / [0.112]

<em>pH = 4.74</em>

The reaction of sodium acetate (CH₃COONa) with HCl is:

CH₃COONa + HCl → CH₃COOH + NaCl

<em>Producing acetic acid, </em>CH₃COOH.

If 0.1mol of HCl reacts the final moles of CH₃COONa are:

0.112mol - 0,1 mol = 0.012mol

Moles of acetic acid are:

0.112mol + 0,1 mol = 0.212mol

Using Henderson-Hasselbalch formula:

pH = pka + log [CH₃COONa] / [CH₃COOH]

pH = 4.74 + log [0.012] / [0.212]

<em>pH = 3.49</em>

<em></em>

Change in pH, ΔpH = 4.74 - 3.49 =<em> 1.25</em>

I hope it helps!

6 0
2 years ago
The Diameter of a chlorine atom is 200. Pm. How many chlorine atoms are required to line up end to end to stretch a distance of
Artist 52 [7]
Diameter = 200pm
200pm -> mm
200pm *^-12 / 1*10^-3 = .0000002
2.0*10-7x mm = 1.0mm
Divide x on both sides

6 0
3 years ago
Read 2 more answers
What is the molarity of a 2.0 liter solution containing 58 grams of nacl?
Savatey [412]
First, need to know the formula of Molarity. 
                     moles of solute
  Molarity = ---------------------------
                      liters of solution

Given 
    2.0 liter of solution 
    58 grams of NaCl

Base of my research the moles of 58 grams of NaCl is 0.750 moles

Solution

                    0.750 moles
Molarity = -----------------------              = 0.375
                             2.0 L

The molarity of this solution is 0.375 
 
4 0
3 years ago
Can you help me on all of these question? (mostly on question number 4)
abruzzese [7]
On four, in real life, she could put it in a strainer and put a bowl below the strainer. The liquid will fall through and into the bowl, but the solids will stay in the strainer. That may not be correct in terms of your reading because I don't know what the reading is.
3 0
3 years ago
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