We’re rewarding the question askers & reputations are being recalculated! Read more.

Questions tagged [titration]

A laboratory method to determine the concentration of an analyte in solution. The solution volume plays a key role in the analysis.

Filter by
Sorted by
Tagged with
-1
votes
1answer
89 views

Is volume of strong base used with strong acid same as volume used with weak acid?

At the equivalence point, why do we take volume of strong base used for titration of strong acid the same as the volume used for titration of weak acid? Shouldn't there be a difference? For example, ...
-1
votes
1answer
499 views

Hardness of water using EDTA calculation issue

I have been asked to work out the hardness of water in German degrees and this is what I did: I got a sample of water I didn’t measure how much I put into my volumetric flask perhaps it was $\pu{8....
-1
votes
1answer
1k views

Why does more acetic acid require more sodium hydroxide in order to be neutralized

I was recently titrating sodium hydroxide against vinegar and based off my results i realised that the vinegars with a higher concentration of acetic acid required more sodium hydroxide in order to ...
-1
votes
1answer
4k views

Titration of H3PO4 and H2SO4 with methyl orange and phenolphtalein as indicators

There are some problems I don't understand how they are solved (I have the answer). Since I can't find anything related to these in google, I'm gonna write the problem and the answer here. Problem: ...
-1
votes
1answer
3k views

Why should colorimetric titration of a weak acid with a weak base not be done in laboratory? [closed]

Why should colorimetric titration of weak acid with a weak base (or vice versa) not be done in laboratory? How can I draw a pH graph for this?
-1
votes
0answers
14 views

Turmeric vs Phenolphthalein for a weak acid/strong base titration

When titrating a weak acid (Acetic acid in mustard) with a strong base (NaOH) why would turmeric (pKa 7.4) or phenolphthalein (pKa 9.4) be better than the other? Apparently turmeric is the better one. ...
-1
votes
1answer
58 views

Polyprotic Acid Titrations

Titrating a mixture of strong and weak acids will yield endpoints such that the volume of base required to reach each endpoint will be different for each acid, e.g. in a mixture of HCl and CH3COOH, ...
-1
votes
1answer
1k views

Why does a colour change in neutralisation occur? [closed]

An indicator shows whether an substance is a base or an acid but during a neutralisation reaction the colour change occurs due to the solution be neutral (i.e pH is 7). But since the indicators only ...
-1
votes
1answer
312 views

Why potassium chromate can be used as indicator in Mohr method?

Both silver chloride and silver chromate are insoluble, so why is that silver chromate is precipitated before silver chromate? Why wouldn't both red silver chromate and white silver chloride form at ...
-1
votes
1answer
63 views

Calculation of composition of drain cleaner

Important note: I'm an eighth-grader. I taught myself chemistry to organic chem using an arsenal of textbooks*, but I have gotten things wrong, namely resonance. Please read above (also this if you ...
-1
votes
1answer
3k views

Find the half equivalence point

How to find the half equivalence point knowing the pH, molarity, titrant added at equivalence point? This a fairly straightforward and simple question, however I have found many different answers to ...
-1
votes
2answers
1k views

Lab Methods for Determination of Phosphoric Acid Concentration

Dear stack exchange, For my next lab session we have been tasked to come up with two different methods for determining the concentration of an unknown sample of phosphoric acid. Design at least ...
-1
votes
1answer
289 views

calculating ph of a mixture of acids

I came across a question that couldn't find the answer to and i couldn't find the answer anywhere. The question is the following. You have a soltion created by dissolving HCN and HBrO in water (T = ...
-1
votes
2answers
2k views

Relating pH and buffer capacity

So, here is the equation for a weak acid - strong base pH curve And here is the expression gotten when the derivative of concentration of hydronium ions with respect to volume of base added is ...
-1
votes
1answer
21k views

What are some sources of error in the preparation of a standard solution (of sodium carbonate) and a titration (determining the concentration of HCl)? [closed]

When preparing a standard solution of sodium carbonate, what are some sources of error? Also, when conducting a titration, what are some errors involved when determining the concentration of ...
-1
votes
1answer
1k views

How to solve titration problem?

A sample of 40.0 mL of a .100 molar HIO solution is titrated with a .150 molar NaOH solution. Ka for hypoiodous acid = 2.3 x ^ (-11) What is the pH of the solution? I have the following work: As you ...
-2
votes
4answers
2k views

Titration of Na2CO3 against HCl

$\pu{25 mL}$ of $\pu{0.125 M}$ $\ce{Na2CO3}$ is titrated with $\pu{0.100 M}$ $\ce{HCl}$. Given that $K_\mathrm{a1} = 4.3\times 10^{-7}$ and $K_\mathrm{a2} = 4.8\times10^{-11}$ for the diprotic acid $\...
-2
votes
1answer
352 views

Why do universal indicators in titration have to be swirled?

Why do universal indicators in titration have to be swirled? Here's a specific example: I am using methyl orange along with hydrochloric acid to test the alkalinity of a set of household cleaners (...
-2
votes
2answers
422 views

Does diluting the titration flask change the molarity

I was solving the following problem on a test and I thought the answer was A, but the answer is actually D. Below is the problem and my reasoning: Answer choice B is clearly incorrect because the ...
-2
votes
1answer
123 views

Why can we ignore the weak conjugate base/acid when calculating the pH in a titration problem? [closed]

Take the reaction 350 mL of 0.8M HCN and 0.6M NaOH for example. The problem asks us the calculate the pH when we add 500 mL of 0.6M NaOH into the 350 mL of 0.8M HCN (This is more than enough to ...
-2
votes
0answers
15 views

Making A Standard Solution for a Required Practical [closed]

I would like to make 500ml of 0.1M Sodium Hydroxide from 2M Solution. To work out the total amount of Sodium Hydroxide needed, would this be the correct way to go? -0.1M of Sodium Hydroxide = 0.1Mol/...
-2
votes
1answer
113 views

Is the following procedure for antacid titration correct? [closed]

I'm trying to check which antacid is more effective by determining the amount of $\ce{HCl}$ they can neutralize. Take $\pu{10 mL}$ antacid suspension and add excess $\pu{1 M}$ $\ce{HCl}$. Back ...
-3
votes
3answers
4k views

Why does a titration have to be precise?

When we do titrations (w/ phenolphthalein) in lab, I know it's fun to see how close we can get the solution to clear, but why does my teacher place so much emphasis on accuracy and criticize ...
-3
votes
1answer
61 views

neutralization of a strong acid with a strong base [closed]

When a 1M H2SO4 is mixed with an equal volume of 1M NaOH, is the mixture acidic, basic, or neutral?
-3
votes
1answer
1k views

How do I determine which is the reduction reaction in a hydrogen peroxide and potassium permanganate solution?

How was it determined that $\ce{MnO4-}$ was reduction, and $\ce{H2O2}$ was oxidation? Also, why wasn’t the equation $$\ce{MnO4- + 2H2O + 3e- -> MnO2 +4OH-}$$ used? Or the $$\ce{H2O2 + 2H+ +2e- -&...
-4
votes
1answer
12k views

Color change of potassium permanganate during a titration with Fe(II)

Is it possible for potassium permanganate to have color change (in a titration) from colorless to pink? If so, then in what circumstances (particularly for a titration)? I have been always been taught ...
-4
votes
2answers
2k views

How to find the equivalence point on a graph of an acid-base titration curve? [closed]

Here is the data taken from the lab: Acid pH, Vol (cm3)[ (9.67, 4cm3) (9.08, 8cm3) (8.70, 10cm3) (8.06, 12cm3) (7.93, 13cm3) (4.76, 14cm3) (2.45, 15cm3) (2.23, 16cm3) (2.10, 17cm3) (2.01, ...
-5
votes
1answer
76 views

What effect, if any, would each of the following actions have on the calculated concentration of the NaOH in this experiment? [closed]

What effect, if any, would each of the following actions have on the calculated concentration of the NaOH in this experiment? (e.g. would the calculated concentration be higher, lower or the same?) ...
-5
votes
1answer
2k views

How to determine the theoretical concentration of the acetic acid solution in mol dm-3 of vinegar

How do you determine the theoretical concentration of an acetic acid solution in mol dm-3 of vinegar that is 5% acetic acid, knowing that the density of vinegar is 1.000g cm-3?
-5
votes
2answers
22k views

How to calculate the equivalent weight or N-Factor of compound(acid, salt, base or etc) using electrolysis concept

Our sir, told us about the concept of equivalent weight using electrolysis and Faraday's Law of electrolysis. We got to know ...