Neutralization Reaction

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In summary, for this reaction, the volume of a .100 M HCl needed to neutralize 25.0 mL of a .350 Molarity Sodium Hydroxide is 87.5 mL. The key to determining if a problem requires a limiting reagent is to look for a situation where one reactant will be used up completely, while the other will have excess left over. In this case, the exact volumes of each reactant allow for the determination of the exact amount of H ions needed to react with the OH- ions present. Therefore, there is no need to find a limiting reagent.
  • #1
Integral0
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What volume of a .100 M HCl is needed to neutralize 25.0 mL of a .350 Molarity Sodium Hydroxide?

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I don't understand why this reaction doesn't require you to determine the limiting reagent (there is none).

The book explicitly says "This problem requires the addition of just enough Hydrogen ions to react exactly with the OH- ions present."

Even with this description my mind is still a little fuzzy on how I can determine when a problem needs a limiting reagent to be found and when a problem doesn't need a limiting reagent found.

Please shed some light on this issue.
 
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  • #2
oops, I know why now.


Since 25 mL is the only exact volume (excluding the molarities). You are finding the exact amount of H that will react with the exact amount of Hydroxides. If HCl had an amount of mL different than NaOH . . . then you would determine the LR.

:D
 
  • #3
Looks like you got it. Do you still need help?

It's pretty easy. Just figure out how many moles of NaOH you have. Then figure out how many mL's HCl that would be.
 
  • #4
Did you come to the right answer? 87.5 ml
 

What is a neutralization reaction?

A neutralization reaction is a type of chemical reaction that occurs when an acid and a base react with each other to produce a salt and water. The products of a neutralization reaction have a neutral pH, which means they are neither acidic nor basic.

What are some examples of neutralization reactions?

Some common examples of neutralization reactions include mixing hydrochloric acid with sodium hydroxide to produce sodium chloride (salt) and water, or mixing sulfuric acid with calcium hydroxide to produce calcium sulfate (salt) and water. These reactions are also commonly seen in everyday life, such as when taking an antacid to neutralize stomach acid.

How do you know when a neutralization reaction has occurred?

The most obvious sign that a neutralization reaction has occurred is the formation of a salt and water. You may also notice a change in the pH of the solution, as it will become more neutral (closer to a pH of 7) after the reaction. Additionally, you may observe heat being released or a change in color or appearance of the solution.

What is the importance of neutralization reactions in everyday life?

Neutralization reactions are essential in many industries, such as water treatment, where they are used to adjust the pH of water to make it safe for consumption. They are also important in the production of many household products, such as cleaning agents and cosmetics. In our bodies, neutralization reactions help maintain the acidic-alkaline balance to keep us healthy.

Can a neutralization reaction be reversed?

Yes, a neutralization reaction can be reversed through a process called hydrolysis. This involves adding water to the salt produced in the reaction, which will break it down into its original acid and base components. However, not all neutralization reactions are reversible, as some produce insoluble salts that cannot be broken down easily.

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