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Recent questions tagged stoichiometry
Questions
Calculate number of bromide ions in 3 moles of mercury (II) bromide
sat
chemistry
stoichiometry
and
the
mole
concept
asked
Jul 2, 2018
by
meena.p
1
answer
$0.5\;g$ of fluming $H_2SO_4$(oleum) is diluted with water. This solution is completely neutralised by $26.7\;mL$ of $0.4\;N\;NaOH$. The percentage of free $SO_3$ in the sample is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Apr 1, 2014
by
meena.p
1
answer
How many g of KCl would have to be dissolved in $60\;g\; H_2O$ to give $20\%$ by weight of solution ?
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Apr 1, 2014
by
meena.p
1
answer
Which of the following has three significant figures ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 28, 2014
by
meena.p
1
answer
Find the equivalent weight of $H_3PO_4$ in the reaction. $Ca(OH)_2 +H_3 PO_4 \to CaHPO_4+2H_2O$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 28, 2014
by
meena.p
1
answer
How many milliliters of $0.5\;M\;H_2SO_4$ are needed to dissolve $0.5\;g$ of copper (II) carbonate ?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 28, 2014
by
meena.p
1
answer
Calculate the molarity of water if its density is $1000 kg/m^3$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 28, 2014
by
meena.p
1
answer
Calculate the molality of 1 litre solution of $93 \ % H_2SO_4 $ (weight / volume). the density of the solution is $1.84\;g/ml$.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 28, 2014
by
meena.p
1
answer
$2.68 \times 10^{-3} $ moles of a solution containing an ion $A^{n+}$ acqired. $1.81 \times 10^{-3}$ moles of $MnO_4^{-}$ for the oxidation of $An^{+} +0 AO_3^{-}$ in acid medium. What is the value of n
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 27, 2014
by
meena.p
1
answer
Statement 1: In the titration of $Na_2CO_3$ with $Hcl$ using methyl orange indicator, the volume required at the equivalence point is twice that of the acid required using phenolphthalein indicator Statement 2: Two moles of $HCl$ are required for the complete neutralization of one mole of $Na_2CO_3$ .
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 27, 2014
by
meena.p
1
answer
Mixture $X$ containing $0.02\;mol$ of $[CO(NH_3)_5 SO_4]Br$ and $0.02\;mol$ of $[CO(NH_3)_ {Br}]SO_4$ was prepared in $2$ litre of solution . $1$ litre of mixture X+ excess $AgNO_3\; \to\; Y $ $1$ litre of mixture $X+$ excess $BaCl_2 \; \to\; Z $. Number of moles of $Y$ and $Z$ are
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 27, 2014
by
meena.p
1
answer
A metallic oxide contains 60% of the metal.The equivalent weight of the metal is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
10 $dm^3$ of $N_2$ gas and $10\;dm^3$ of gas at X at the same temperature contain the same number of molecules. The gas $X$ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 26, 2014
by
sreemathi.v
1
answer
A sugar syrup of weight 214.2g contains 34.2g of sugar ($C_{12}H_{22}O_{11})$. Calculate (i) Molal concentration and (ii) Mole fraction of sugar in the syrup.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 26, 2014
by
sreemathi.v
1
answer
Assuming fully decomposed,the volume of $CO_2$ released at STP on heating 9.85g of $BaCO_3$ (Atomic mass of Ba=137) will be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
A gas is found to have formula $[CO]_x$.If its vapour density is 70 then the value of x is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 25, 2014
by
sreemathi.v
1
answer
In alkaline medium,$KMnO_4$ reacts as follows:$2KMnO_4+2KOH\rightarrow 2K_2MnO_4+H_2O+O$.Therefore,the equivalent weight of $KMnO_4$,will be
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
'M' g of an element gave 'N' g of oxide.Equivalent weight of the element is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 25, 2014
by
sreemathi.v
1
answer
A container of volume V contains 0.28g of $N_2$ gas.If the same volume of an unknown gas under similar conditions of temperature and pressure weighs 0.44g,the molecular mass of the gas is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
112.0ml of $NO_2$ at STP was liquefied,the density of the liquid being $1.15gmL^{-1}$.Calculate the volume and the number of molecules in the liquid $NO_2$.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 25, 2014
by
sreemathi.v
1
answer
Chemical reactions involve interaction of atoms and molecules.A large number of atoms/molecules are present in a few grams of any chemical compound varying with their atomic/molecular masses.To handle such large numbers conveniently,the mole concept was introduced.This concept has implications in diverse areas such as analytical chemistry,biochemistry,electrochemistry and radiochemistry.The following example illustrates a typical case involving chemical/electrochemical reaction.A H.O molar aqueous solution of NaCl is prepared and 500ml of this solution is electrolysed.This leads to the evolution of chlorine gas at one of the electrodes(atomic mass:Na=23,Hg=200;1 faraday=96500 coulombs).The total charge (coulombs) required for complete electrolysis is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 25, 2014
by
sreemathi.v
1
answer
The specific heat of a metal is 0.11 and its equivalent weight is 18.61.Its exact atomic weight is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 25, 2014
by
sreemathi.v
1
answer
$6.0\times 10^{20}$ molecules of urea are present in 100ml of its solution .The concentration of urea solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 25, 2014
by
sreemathi.v
1
answer
5.85g of NaCl is dissolved in 1L of pure water.The number of ions in 1ml of this solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 25, 2014
by
sreemathi.v
1
answer
20g of sample of $Ba(OH)_2$ is dissolved in 50c.c of 0.1N HCl solution.The excess of HCl has titrated with 0.1NaOH.The volume of NaOH used was 20c.c.Calculate percentage of $Ba(OH)_2$ in the sample
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 24, 2014
by
sreemathi.v
1
answer
The equivalent mass of chlorine is 35.5 and the molar mass of copper is 63.5.The equivalent mass of copper chloride is 99.0.Hence formula of copper chloride is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 21, 2014
by
sreemathi.v
1
answer
In the standardization of $Nas_2S_2O_3$ using $K_2Cr_2O_7$ by iodometry , the equivalent weight of $K_2Cr_2O_7$ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 21, 2014
by
meena.p
1
answer
Consider a titration of potassium dichromate solution with acidified Mohr's salt solution using diphenylamine as indicator. The number of moles of Mohr's salt required per mole of dichromate is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 21, 2014
by
meena.p
1
answer
The number of moles of $KMnO_4$ that will be needed to react completely with one mole of ferrous oxalate in acidic solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
difficult
asked
Mar 21, 2014
by
meena.p
1
answer
An aqueous solution of $6.3\;g$ oxalic acid dihydrate is made up to $250\;ml$ . The volume of $0.1\;N\; NaOH$ required to completely neutralize 10 ml of this solution is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
medium
asked
Mar 21, 2014
by
meena.p
1
answer
The normality of $0.3\;M$ phosphorous acid $(H_3P0_3) $ is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 21, 2014
by
meena.p
1
answer
The equivalent weight of $ MnSO_4$ is half its molecular weight when it is converted to
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 21, 2014
by
meena.p
1
answer
A molal solution is one that contains one mole of a solute in
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
easy
asked
Mar 20, 2014
by
meena.p
1
answer
The density of $3M$ solution of $Na_2S_2O_3$ is $1.25$ $g mL^{−1}$. Calculate the mole fraction of $Na_2S_2O_3$.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q200
medium
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
The density of 3M solution of $Na_2S_2O_3$ is 1.25 g $mL^{-1}$ Calculate the $\%$ by weight of $Na_2S_2O_3$.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q199
medium
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of water required to make $1\;N$ solution from $2\; mL$ concentrated $HNO_3?\;(\text{Normality}_{HNO_3} = 15.78)$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q197
medium
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Volume of acid that contains 63g pure acid.
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q197
easy
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
$HNO_3$ used as a reagent has specific gravity of $1.42 mL^{-1}$ and contains $70\%$ by strength $HNO_3$. Calculate Normality of acid
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q96
easy
asked
Feb 11, 2014
by
sharmaaparna1
1
answer
How many of $KCl$ would have to be dissolved in 60g $H_2O$ to give 20% by weight of solution?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q49
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
The mole fraction of NaCl in a solution containing 1 mole of NaCl in 1000g of water is
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q48
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
Number of $H^+$ ions in 100ml of 0.001M $H_2SO_4$ is
sat
chemistry
stoichiometry and the mole concept
jeemain
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q47
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
Which does not change on dilution?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q46
easy
asked
Jan 9, 2014
by
sreemathi.v
1
answer
$RH_2$(ion exchange resin)can replace $Ca^{2+}$ in hand water as,$RH_2+Ca^{2+}\rightarrow RCa+ 2H^+$.1 litre of hard water passing through $RH_2$ has PH is 2.Hence hardness in PPM of $Ca^{2+}$ is:
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q45
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
How much water is to be added to dilute 10ml of 10M HCl to make it decimolar?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q44
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
25ml of 3.0M $HNO_3$ are mixed with 75ml of 4.0M $HNO_3$.If the volumes are additive,the molarity of the final mixture would be :
jeemain
chemistry
physical-chemistr
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q43
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
$4I^-+Hg^{2+}\rightarrow HgI_4^{2-}$;1 mole each of $Hg^{2+}$ and $I^-$ will form _________ mole $HgI_4^{2-}$
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q31
easy
asked
Jan 8, 2014
by
sreemathi.v
1
answer
A sample of $MnSO_4.4H_2O$ is heated in air to give $Mn_3O_4$.The residue $Mn_3O_4$ is dissolved in 100ml of $N/10$ $FeSO_4$ containing $H_2SO_4$.The solution reacts completely with 50ml of $KMnO_4$.25ml of this $KMnO_4$ requires 30ml of N/10 $FeSO_4$ for complete oxidation.Determine the amount of $MnSO_4.4H_2O$ is the sample
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q41
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
1gm of $Fe_2O_3$ solid of 55.2% purity is dissolved in acid and reduced by heating the solution with Zn dust.The resultant solution is cooled and made up to 100ml,25ml of this solution requires 17ml of 0.0167M solution of an oxidant.Calculate the number of electrons taken up by the oxidant in the above reaction.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q40
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
25ml of a solution containing HCl and $H_2SO_4$ required for neutralized 24.10ml of N/2 caustic soda solution.25ml of the same solution on precipitation with $BaCl_2$ yielded 0.5218gm $BaSO_4$.What wt of each acid is contained in one litre of the solution?
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q39
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
$0.5gm$ of $H_2SO_4$(oleum) is diluted with water.This solution is completely neutralized by 26.4ml of 0.4N NaOH.Find the % of free $SO_3$ in the sample.
jeemain
chemistry
physical-chemistry
class11
unit1
some-basic-concepts-in-chemistry
stoichiometry
q38
difficult
asked
Jan 8, 2014
by
sreemathi.v
1
answer
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