Questions tagged [acid-base]

This tag should be applied to questions concerning acid and base reactions. An acid is capable of donating a hydron/ proton (Brønsted acid) or capable of forming a covalent bond with an electron pair (Lewis acid). A base on the other hand is a chemical species/ molecular entity having an available pair of electrons capable of forming a covalent bond with a hydron/ proton (Brønsted base) or with the vacant orbital of some other species (Lewis base).

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Lewis Acid / Base reaction for SO2 and H2O

I am having trouble with this question: Identify the Lewis acid and Lewis base in each of the following reactions: $\ce{SO2(g) + H2O(l) = H2SO3(aq)}$ What I tried: A Lewis acid is an electron pair ...
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Strong and weak acid

I know sulfuric acid is a strong acid and acetic acid is a weak acid. However when I write them in their chemical symbol. Sulfuric acid: $\ce{H2SO4}$ Acetic acid: $\ce{CH3COOH}$ I realise that ...
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Which white powders form acids when mixed with water?

I have a mystery acid which isn't citric, boric, or oxalic acid. When mixed with water, it smells pungent, like hydrochloric acid--though I haven't compared them side by side. Which other white ...
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297 views

Finding the pH of a mixture of weak acid and strong base

What are the steps we go about in finding the pH of a solution of strong base and weak acid? Here is the question that I've been given What is the pH of a solution made by mixing $\pu{50 ml}$ of $\pu{...
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Are these two reactions the same? [duplicate]

I read the book an it said when $\ce{NH4Cl}$ dissolves in the water, the reaction of $\ce{NH4+}$ will be $$\ce{NH4+ <=> NH3 + H+},$$ but instead, the first reaction came to my mind was $$\ce{...
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How to calculate pH of the Na2CO3 solution given ambiguous Ka values

This is the exact question I faced on an exam. Calculate the pH of $\pu{0.05 M}\ \ce{Na2CO3}\ (\ce{H2CO3}: K_\mathrm{a,1}= 4\times 10^{-7},\ K_\mathrm{a,2}= 4.7\times 10^{-11})$ Solution $$\ce{Na2CO3 -...
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Confused about strong/weak dibasic and tribasic acids

I know that sulfuric acid is considered a strong acid, and the dissociation of its first $\ce{H+}$ ion is complete and of its second $\ce{H+}$ ion is partial. Phosphoric acid is weak and all three of ...
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Why is phosphorous acid more acidic than phosphoric acid?

Phosphoric acid has basicity of 3 i.e it can loose 3 $\ce{H+}$ while phosphorous acid has basicity of 2. Why is phosphorous acid more acidic than phosphoric acid? Acidity refers to the ability to ...
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acids, bases, salts, etc

All the chemical compounds can be categorized as acids, bases, and neutral compounds. There are different theories, namely Arrhenius Theory, Brønsted-Lowry Theory, Lewis Theory, which define the acids ...
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pH of a weak base calculation

Calculate the $\ce{pH}$ of a $100$ $\ce{mL}$ solution containing $0$$.0375$ moles of the weak base, Sodium Benzoate, $\ce{C6H5COONa}$. $$\ce{C6H5COO + H2O -> C6H6COO- + OH-}$$ $$\frac{0.0375 ~\...
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Mechanism in formation of acetals

someone asked a question about this mechanism and there were 2 answers as shown below. but these two answers seem contradict. and my questions are 1. which one is right? 2. does the protonation by ...
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Reaction of nitro compounds with strong alkali?

Why does a primary and a secondary nitro compound behave as an acid in the presence of strong alkali whereas tertiary nitro compounds do not? Can anyone explain it with reactions?
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1answer
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Why does buffer capacity of tartrate buffer generally decrease as the buffer pH increases?

From what I see, the buffer capacity of tartrate buffer is generally decreasing as buffer pH increases. Why is this? Also, does this mean that tartrate buffer doesn't have a maximum buffer capacity at ...
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What is the difference between the titration of a strong acid with a strong base and that of the titration of a weak acid with a strong base?

Which of the following statements best characterizes the difference between the titration of a strong acid with a strong base and that of the titration of a weak acid with a strong base? A) Both ...
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1answer
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Confused on normallity

So normality is 'equivalents' over liters solution right? I'm having a hard time understanding exactly what an equivalent is. At first from one thing I read i thought it was just the H released from ...
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Highly concentrated NaOH solution at high temperature vs borosilicate glassware and cellulose?

I've read here on stack-exchange that NaOH will react with glass through the following reaction: 4 NaOH + SiO2 ⤑ Na4SiO4 + 2 H2O I would like to briefly heat a highly concentrated NaOH solution to ...
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What will happen when a metal reacts with an acid which is neither dilute nor concentrated? [closed]

We have always studied about metals reacting with dilute and concentrated acids, but I do not understand what will happen if the same metal reacts with an acid that is neither concentrated nor dilute?
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What type of chemical reaction is this?

So far we have learned about about single displacement, double displacement, gas evolving, neutralization, synthesis, disassociation, and combustion. I was trying to solve the following chemical ...
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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?
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Calculating dissociation constant at different pKw values

What are the standard approaches to calculating how dissociation constants for acids and bases, $\mathrm{p}K_\mathrm{a}$ and $\mathrm{p}K_\mathrm{b}$, change as the ionic product of water, $\mathrm{p}...
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Why does vinegar and baking soda yield a far smaller volume of carbon dioxide gas than expected from calculation?

I experimented $\ce{CO2}$ generation by adding $\pu{4 g}$ of $25\%$ acetic acid water solution ($= \pu{1 g}$ of acetic acid) to $\pu{1.4 g}$ of pure baking soda. But this mixture yielded only $50\%$ ...
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1answer
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Is Sodium Hydroxide a Bronsted-Lowry Base?

I know that sodium hydroxide dissociates into sodium cation and hydroxide, so it must be an Arrhenius base. I am also aware of the rule that all Arrhenius acids and bases are considered to be Brønsted-...
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1answer
779 views

Reaction between silver(I) hydroxide and an alkali [closed]

I've read about this in a booklet, but I can't find its stepwise reactions or its derivation: $$\ce{AgOH + NaOH -> Ag2O}$$ And how does a base ($\ce{AgOH}$) react with another base ($\ce{NaOH}$)? ...
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Questions on Neutral oxides

Neutral oxides, are non metal oxides which are neither acidic nor basic. I have noticed a pattern for neutral oxides which I am unsure actually holds true. $\ce{CO}$, $\ce{H2O}$, $\ce{NO}$ and $\ce{...
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Is Magnesium Oxide alkali [closed]

Given that Magnesium Hydroxide is an alkali, can we say Magnesium Oxide is an alkali since dissolving Magnesium Oxide in water can produce Magnesium Hydroxide?
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591 views

What is the pH of HCl solution at $10^{-8}$M? [duplicate]

After using the negative logarithmic value of $\ce{H^+}$ ion concentration, I get a value of pH that results in base. Can you please help me? Thank you in advance
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449 views

How does sodium carbonate raise pH?

Sodium carbonate is used in pools to raise pH. From my understanding, it would dissociate in water like so: $$\ce{Na2CO3 <=> 2 Na+ + CO3^2-}$$ To raise pH, doesn't it have to absorb hydrogen ...
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1answer
245 views

What is the acid base reaction between hydrogen telluride and sulfide ion?

$$\ce{H2Te + S^2- -> ?}$$ I tried this problem but I was confused on the fact of what the products would be because in my head I didn't think $\ce{STe}$ is a product and also it has to create ...
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Would distilling a sodium fluoride solution generate hydrogen fluoride to any noticeable extent?

If you have a solution of NaF, and you boil it (to get pure water by distillation) can the fluoride ions in water separate from sodium ions and combine with hydrogen ions to form HF? ...

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