30 Answered Questions for the topic Acid Base

07/16/19

Why is acetic acid more acidic than phenol?
Acetic acid (ethanoic acid, $\\mathrm pK_\\mathrm a \\approx 5$) is more acidic than phenol ($\\mathrm pK_\\mathrm a \\approx 10$), which is reflected in their reactivity with a weak base such as... more
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07/11/19

Why is the iodide anion a good nucleophile but a poor base?
The $\\mathrm{pK_{aH}}$ of $\\ce I^-$ is very low which indicated that it is not favourable for it to bond with a proton. However, why would it be likely to bond with any other atom (mostly carbon... more
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07/07/19

Why concentrated sulfuric acid for dehydration and dilute for hydration?
To dehydrate ethanol one uses concentrated sulfuric acid: $$\\ce{C2H5OH ->[\ ext{conc.} H2SO4] C2H4 + H2O}$$ but to go in the reverse direction, dilute sulfuric acid is used: $$\\ce{C2H4 +... more
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07/05/19

Does unsubstituted benzoic acid not show resonance due to steric effects?
My book says that benzoic acid does not show resonance as the carboxylate anion and the benzene ring are not in the same plane due to steric effects. But there aren't any large groups in the... more
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06/24/19

Difference between Sildenafil and Sildenafil citrate?
The data I found seems to show no difference between Sildenafil and Sildenafil citrate. But if they are the same things, why Pfizer use Sildenafil citrate instead of Sildenafil as their product... more
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Acid Base Organic Chemistry

04/21/19

Condition For NaHCO3 to react to form CO2 with organic acids?
My professor told us the following: NaHCO3 will react to evolveCO2 whenever the acidic nature of the reactant exceeds the acidic nature of benzoic acid. I want to know why this is. And is the... more
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03/15/19

Why are acetals stable to bases and nucleophiles?
> Why are acetals stable to bases and nucleophiles? Could it be due to electronic effects? Lone pairs on the two oxygen atoms create an unfavorable environment for the approaching nucleophiles... more
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03/14/19

Is it possible to synthesise ethers from carboxylic acids?
Is it possible to synthesise ethers from carboxylic acids, and if so, how? By ether I mean an ether in general, not just specific examples.
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03/13/19

Relative acidities of alkanes, alkenes, and alkynes?
How does one explain the trend in bond lengths and acidity of the following hydrocarbons?
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03/13/19

What's the difference between a nucleophile and a base?
Obviously it depends on the context whether you would call a particular species a nucleophile or a base but are the two terms largely synonymous or is there a difference?
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02/01/18

chemical that would react with ribitol phosphate.
i am a microbiologist, and i have a question from chemistry. i would like to know what are the possible kind of chemicals that would react with ribitol phosphate and result in a colour change or... more
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Acid Base Chemistry Ph

01/08/18

If I dissolve a Rolaids tablet (550 mg CaCO3 and 110 mg Mg(OH)2) in 25 ml of water and then add 25 ml of 0.1M HCl, what will be the final pH?
Am doing an experiment on antacids and need to know pH of Rolaids tablet in water, followed by pH of mixture after HCl is added. 
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Acid Base

11/20/17

Calculation for buffers
How to calculate amount of sodium acetate and acid acid to produce 500ml 50ppm of fluoride solution
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11/16/17

If 8 ml of 0.3 M HCL solution is mixed with 12 ml of distilled water calculate the pH of the diluted solution?
please show your working
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04/07/17

How much 1M HCl should I add to 100 mL H2O to lower its pH by 1?
It's for a Biology project- I need to have different pH of solutions, with my base point being water with a pH of 7, and then increments down to a pH of 3. I don't know how much HCl to add for each... more
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Acid Base

04/01/17

the human body is completely neutral
between 20 and 10000 characterrs.
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08/28/16

If a patient has a blood volume of 4.7L, how much H+ is in deficit?
I know that is has to do with pH and hydrogen ions, but i do not know what is the correlation between volume and hydrogen ions
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08/12/16

chemistry about base and acid and buffer
hello, I was wondering if you'd be able to help me with chemistry?tomorrow I have an exam and I don't understand some things. 1. when can you say of a buffer is effective or not?2. so the prof gave... more
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03/09/16

Buffer/Titration Chemistry Problem??! PLEASE HELP - I AM LOST!!!
A 25.0 mL sample of 0.723 M HClO4 is titrated with a 0.273 M KOH solution. The H3O+ concentration after the addition of 66.2 mL of KOH is __________ M. 0.723 1.00 × 10-7 2.81 × 10-13 0.439... more
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02/08/16

the reactions of amines and it's solubility
How does the solubility in water differ for the nitrogen containing compounds? Suggest reasons for this.What would you expect the solubility in non-aqueous solvents to be? Does your answer to this... more
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02/08/16

Equation for carboxylic acids and their derivatives
Write an equation for the reaction of PCl5 with ethanoic acid:   and    How might testing pH followed by the reaction with PCl5 be useful in an analysis of an unknown organic compound?
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Acid Base Chemistry

12/07/15

Weak acid and base calculations
How many grams of ammonia must be added to water to make one leader of an ammonia solution with a pH of 11.81
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11/20/15

What is the effect of acidification of oceans on uptake of calcium carbonate for shelled organisms??
What is the effect of acidification of oceans on uptake of calcium carbonate for shelled organisms?
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11/20/15

Why does an acidic soil cause plants to take up more toxic minerals?
Use chemical equations to explain the answer.
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08/03/15

The balanced equation for the reaction between sodium oxide and water is
A. Na2O + H2O → 2NaOH B. Na2O + H2O → 2NaH + O2 C. Na2O + H2O → 2Na + H2O2 D. Na2O + H2O → 2Na + H2 +O2   How do I know which reaction will occur?
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