If your question is part of your high school or college/university homework, please use this tag. Do not use this as the only tag on a question. It signifies that instead of a direct answer, care should be taken to explaining the steps to the solution, preferably sticking to just giving helpful, ...

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1answer
14 views

What will happen to the conductivity of weak electrolyte as dilution increases?

Suppose initially the dissociation was 10% ... then if 1oo molecules were there 10 would be formed . After dilution , number of molecules will be 50 but dissociation would be >10% ... Now if it is 15% ...
-2
votes
1answer
22 views

Role of NaOH in the given reaction

In the conversion of haloarenes to phenol,NaOH is used to convert How does NaOH does this reaction?What is the mechanism?
-2
votes
1answer
22 views

Spontaneous processes:Explain the following line please [on hold]

Explain the following line, please: The natural (spontaneous) processes follow a non-equilibrium path and as such are irreversible but these processes proceed up to establishment of equilibrium.
-1
votes
0answers
14 views

Question on relative atomic mass (atoms) [on hold]

the abundance of the three isotopes of magnesium of mass number 24,25 and 26 are78.6%,10.1% and 11.3% respectively. what is the relative atomic mass of magnesium. pls note show your workings thank you
1
vote
0answers
25 views

Which dicarboxylic acid has the most acidic hydrogen?

1.Maleic Acid 2.Fumaric Acid 3.Succinic Acid 4.Malonic Acid Which of the following acids has the most acidic hydrogen? According to me malonic acid should have the most acidic ...
-1
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0answers
10 views

Reaction of unsaturated carboxylic acid [on hold]

acrylic acid can react with magnesium? If the reaction is occur then what product will produced
-1
votes
1answer
14 views

chemical reactions and energy [on hold]

Ammonia is an important ingredient in many fertilizers. The main process by which ammonia is made is the Haber process. In this process, nitrogen gas and hydrogen gas are reacted to form ammonia at ...
1
vote
1answer
23 views

Homework help for chemistry [on hold]

I can't seem to get this problem correct, and no one seems to be able to help me, anyone have any ideas?
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votes
2answers
44 views

Need to find series of equation products from given reagents

I can balance equations but only if I already know both sides. Trying to find the following products: $$\begin{aligned} \ce{Na2S2O5 + O2 ->}\ ?\\ \ce{Na2S2O5 + KNO3 ->}\ ?\\ \ce{Na2S2O5 + KNO3 +...
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0answers
15 views

How many gold atoms in a nano particle which have diameter of 1 nano-meter [on hold]

How many gold atoms in a nano particle which have diameter of 1 nano-meter ?
-4
votes
1answer
25 views

Bleach dilution percentage [on hold]

Timothy has 1 gallon of 6% bleach, assume 94% is water. Timothy decides to dilute the bleach separately. Timothy pours 10mL, 9mL, 8mL, 7mL, 6mL, and 1mL, of the bleach into 6 different containers and ...
1
vote
1answer
38 views

A steel sample was analysed for nickel

A steel sample (0.3500 g) was dissolved in nitric acid and the resulting solution made up to 500 ml. The absorbance of this solution measured by atomic absorption was found to be 0.410. A standard 6 ...
0
votes
0answers
23 views

A cereal sample was assayed for Iron content as follows: [on hold]

10 g cereal sample was digested with HCl and the resulting mixture made up to 50 ml in a volumetric flask. The absorbance of this solution was 0.224. An 8 ppm iron solution gave an absorbance of 0.340....
0
votes
1answer
21 views

Is Q in the Nernst equation [Reduction]/[Oxidation] or [Oxidation]/[Reduction]?

The Nernst equation is given by : $$E_{cell} = E_0 – \frac{RT}{nF}\ln{Q}$$ I have seen ${Q}$ given as both ${[oxidation]/[reduction]}$ and ${[reduction]/[oxidation]}$. When does each form apply? ...
1
vote
1answer
32 views

A cereal sample was analysed for Calcium content as follows:

A cereal sample was analysed for Calcium content as follows: A 5g cereal sample was digested with HCl and the resulting mixture made up to 50ml in a volumetric flask. The absorbance of this solution ...
2
votes
1answer
46 views

Difference between the structure of nitrito-o and nitrito-n?

I am preparing for chemistry olympiad and I am stuck nitrito -o and nitrito-n. Can anyone explain difference between the structure of nitrito-o and nitrito-n or point a resource which is suitable for ...
1
vote
3answers
58 views

HS chemistry- Why does dissolving a salt in water get a high pH?

So I dissolved some sodium carbonate in water and I measured the ph. It turned out to be 11. I don't really understand why dissolving it in water increased the ph. I mean, I know that pH if water was ...
0
votes
0answers
21 views

Migrating group in the Baeyer-Villager oxidation [duplicate]

Predict the product according to the answer, it should be: but the answer is: Can someone explain to me why is this happening and how to decide on which side the oxygen atom is to be ...
0
votes
1answer
40 views

What will be the equivalent weight? [on hold]

This question is simple but I posted this because I am unable to do all sums similar to this. My answer is not matching with the one in my book. Please help. The question is: $4215~\mathrm g$ of ...
3
votes
1answer
354 views

Which hydrogen of 3-methylcyclohex-2-en-1-one is the least acidic?

According to me it should be 2, as on its removal there wont be any resonance stabilization as would happen in other cases. In addition to that a negative charge residing on a carbon attached to a ...
-1
votes
0answers
8 views

What is the osmotic pressure in torr? [closed]

The osmotic pressure, in torr, of a 0.0642 M aqueous solution of a molecular compound at 25 ºC is
0
votes
1answer
32 views

Can compounds (or only elements) be referred to as oxidising and reducing agents?

In the reaction $$\ce{3CuO (s) + 2NH3 (aq) <=> N2(g) + 3H2O(l) + 3Cu(s)}$$ the oxidation number of $\ce{Cu}$ goes from +2 in the reactant side to 0 in the products, and so it is reduced. The ...
3
votes
1answer
83 views

Predict the products of the controlled oxidation of 2-methylpentan-2-ol

Predict the products of the controlled oxidation of 2-methylpentan-2-ol. From what I know, since 2-methylpentan-2-ol is a tertiary $(3^\circ)$ alcohol, there should be no reaction. However, my ...
0
votes
1answer
19 views

Half equations : when is the product a compound and when is it 2 ions?

When finding the half equation and overall redox equation for the following: a) $$\ce{Fe^2+(aq) + Cl2(g) <=>}$$ b) $$\ce{N2(g) + H2(g) <=>}$$ The solution from the textbook is ...
0
votes
0answers
16 views

Find Percentage Purity [closed]

A sample of chalk contains clay as impurity. The clay loses 11% of its weight as moisture on prolong heating. 5 gram sample of chalk on heating shows a loss in weight(due to evolution of CO2 and water)...
0
votes
1answer
52 views

Determination of initial excited state via luminescence

A one electron species initially in the some excited state ($n_i$) is irradiated with a light of wavelength 121 nm when the electron is promoted to a further higher orbit ($n_f$). In ...
2
votes
1answer
53 views

Can wedge and dash bonds on 1, 2 position of cyclohexane ring be used to signify trans orientation of the substituents?

It means trans or just to show that the molecules lie in diff planes or sth. Please answer and explain my query. Help will be appreciated. Thanks. Edit1: I've to make the structural isomers for ...
0
votes
2answers
41 views

Transition from ground state to excited state

I don't understand how to correctly find the term symbol of an excited state. I know that the first two permitted transitions for the Ne atom are 16.8eV and 19.8eV and I want to find the electronic ...
3
votes
2answers
53 views

How do i convert benzoic acid to meta-fluorobenzoic acid?

in not more than 3 steps. i did it but the process was a little long. here is my attempt
-3
votes
0answers
4 views

Calculations Using Unit Cells [closed]

1) What is the density of Cr if the edge length is 2.884 Angstroms? 2) What is the edge length of Ag if the density is 10.6 g/cm^3?
0
votes
0answers
10 views

Finding Molar Mass of an Unknown Volatile Liquid [closed]

this question came up in my lab report and i'm not sure how to solve it. This is grade 11 chemistry and the unit we are doing currently is Gases. The data given to me is : 1.) mass of empty, dry 125 ...
2
votes
2answers
37 views

Product of the addition of 1 eq. bromine to 1-methylcyclohexa-1,4-diene

When we add one equivalent of $\ce{Br2}$ then which double bond will get brominated (figure of molecule attached)? Attempt: the double bond in the molecule with methyl group will be more stable as ...
-4
votes
0answers
33 views

why some fully filled transistion metals are coloured? [closed]

I am a student immediately I have the answer for this question.so please any one posted the answer immediately.
0
votes
2answers
36 views

Why do we need three equations to find the pH of NaCN, given Ka(HCN)?

To find the pH of a 1.0 M solution of $\ce{NaCN}$, given $\ce{Ka(HCN) =4.9E(-10)}$ The solution (refer end of question) uses three equations: Equation 1 : $\ce{HCN + H2O <-> CN- + H+}$ ...
3
votes
2answers
209 views

How to name this benzene alcohol?

The following is the molecule I am confused about. Earlier in my textbook it gives an example of how to name benzenes with 2 or more hydroxyl groups: My textbook (Nelson 12 Chemistry) is ...
0
votes
2answers
59 views

Naming of butene derivative

Please name this compound for me.
2
votes
2answers
41 views

How do non-sublimable solids exist in equilibrium with vapour

All substances exist in equilibrium with vapour, something I learned from Jan's comment. But my question how do that happen with solids that are non sublimable, like ice, piece of iron and a piece of ...
3
votes
2answers
64 views

Can a system of 2 consecutive Biphenyl systems be optically active , even if any adjacent biphenyl systems arent optically active?

This question came in an online test, where they asked whether or not 22,26-dibromo-12,32-dichloro-23,25-diiodo-16,36-dimethyl-11,21:24,31-terphenyl was optically active. (The answer is that it is ...
0
votes
2answers
40 views

What are the order of the reaction under the following conditions?

The experimental rate of a reaction $$\ce{A + 2B -> C + D}$$ $$\frac{\mathrm dx}{\mathrm dt} = K[\ce{A}][\ce{B}]^2$$ Calculate the order of the reaction when (i) $[\ce{A}]\gg[\ce{...
2
votes
3answers
84 views

Why is the boiling point of a solution higher than that of a pure solvent? [duplicate]

My reasoning When non-volatile solid solute is added to a solvent some of the liquid solvent molecules are replaced by solute molecules at the surface.The lesser the number of solvent molecules at ...
1
vote
0answers
33 views

Inorganic Qualitative Analysis Puzzles

I am not sure if this is the correct place to be asking this question. If it isn't, I will delete it. I wondering if anyone have any inorganic qualitative analysis puzzles like the below. It should ...
0
votes
1answer
25 views

How is Potassium Hydroxide KOH manufactured today? [closed]

How is Potassium Hydroxide KOH manufactured today? What are the byproducts of KOH? Which Soil Analysis (TPH, pH, Metals, VOC, SVOC) will detect the byproducts of KOH?
0
votes
0answers
20 views

What is the mathematical reason behind the gradual increase in osmotic pressure?

Is the following reasoning correct? Question: Arrange the following in increasing order of osmotic pressure, 0.1 M cane sugar, 0.1 M NaCl solution, 0.1M H2SO4. Solution: As the number of particles/...
-1
votes
2answers
45 views

How should I name this cyclic alkane?

Can anyone help me name (with IUPAC conventions) the following cyclic alkane? My textbook (Nelson. It's possibly the worst textbook series) lists the answer as 1,3-dichlorobutane except there are no ...
0
votes
1answer
57 views

What is the IUPAC name of Sodium nitroprusside? [duplicate]

I have checked wikipedia it says the IUPAC name is Sodium pentacyanonitrosylferrate(II). But according to me its Sodium pentacyanonitrosylferrate(III). Na2[Fe(CN)5NO] Oxidation number calculation -...
1
vote
1answer
31 views

Acid Catalyzed Hydration of an Alkene Synthesis Problem

Devise syntheses of the following three compounds, starting in each case with any alkene that contains four carbons or fewer. You do not have to write mechanisms, although at this point it may be very ...
0
votes
1answer
40 views

Melting points of alkali metal halides

The correct order of melting point of alkali metal halides is: $\ce{MF}>\ce{MCl}>\ce{MBr}>\ce{MI}$ $\ce{MI}>\ce{MBr}>\ce{MCl}>\ce{MF}$ $\ce{MCl}>\ce{MF}>\ce{MBr}>...
0
votes
1answer
42 views

Empirical formula, simplifying problems

Need some help with second part.....can't get it to be balanced and therefore can't find the formula and name! Thanks in advance! What is the empirical formula of each of the following compounds? a)...
0
votes
1answer
35 views

Alkali and alkali earth metal carbonates and bicarbonates decomposition

Which of the following can not decompose on heating to give $\ce{CO_2}$? $\ce{Li_2CO_3}$ $\ce{Na_2CO_3}$ $\ce{KHCO_3}$ $\ce{BaCO_3}$ What I have read till now: Lithium carbonate ...
-1
votes
0answers
49 views

Why isnt ethanol a base? [duplicate]

Why isnt ethanol a base since it contains an OH group? I realize it is an alcohol but what happens when it is suspended in water?