Chemistry Forum

Hey it should be like this, since carbonic acid is diprotic acid and when it dissociates, first it loses its first proton and then it loses its second proton. CO2 + H2O ⇌ H2CO3 H2CO3 ⇌ (equilibrium sign) HCO3− + H+ Carbonic acid giving off bicarbonate and proton (H+). Y...

Hey you are supposed to add these two half reaction in order to make a full reaction so for example in your case you have Mangnese being oxidized and nitric acid (HNO3) being reduced. So your purpose is to combine both of these or "add" these two reactions but you have to make sure that th...

2 CuCO3 + Ca(OH)2 = Ca(CO3)2 + 2 CuOH

Do not put the states such as (aq) in the equation while balancing and secondly it is NaCl not NACl "Na" is correct. Andm why do you have "_" before every compound. Keep it simple. 3 NaOH + FeCl3 = Fe(OH)3 + 3 NaCl The second one does not really have any problem just that DO NOT ...

a) its bit hard to draw so i guess I can just try in words :| step by step 1. Draw a phosphoros molecule in middle since it is the centreal atom . It has five valence electron. P 2. Draw 3 Chlorine atoms around the central atom P. Chlorine has 7 valnce electrons and in total 3 Cl has 3 x 7= 21 valen...

a. Single replacement Reaction
b. Decomposition Reaction
c. Decomposition Reaction
d. Double replacement Reaction


Hope that helps..
-Sharan

Hey just use this...

http://www.webqc.org/balance.php
put ur equation there you will get the answer

-Sharan

sorry for the typo i meant
(2moles of Al2O3 * 3.7 moles of Al)/ (4 moles of Al)
=1.85 moles of Al2O3

-sharan

hey yeah i got the pic but i dunt understand why do u need to set up a dimensional analysis table.. we dunt hv anything we need to convert to umm maybe in the end we want to convert grams to kg :S then just 188.7 grams* 1kg/1000gm= 0.1887 Kg or if you taking about the moles things... we just went fr...

1. Cu(OH)2 = CuO + H2O [decomposition reaction]


2. CuO + 2 HCl = CuCl2 + H2O [double replacement reaction]

hope that helpss//

-Sharan

use the gas laws... the second problem seems to just foloww the equation where pressure is constant since it is not mentioned. So basically, always use ideal gas equation which is PV=nRT where p is pressure v is volume n is no. of moles R is gas constant and T is temperature. So in first problem. Th...

hey the reason why we ignoring the oxygen is because we always consider the limiting reagant (whichever reactant is in less amount) to determine how much product we are going to get. In this case obviosuly aluminium is limiting reagant since oxygen is pressence in abundance right. So we find moles o...

at equivalance point,

C1V1= C2V2

Therefore,
C1V1 (Hypochlorite) = C2V2 (HCl)
20 cm3 * C1 = 25.30 cm3 * .5 M
C1= ( 25.3 * .5 )/ 20
=.6325 or ~0.633 [with 3 significant digits after point (.)]

hope that helps...

-Sharan

start with balanced equation of combustion of aluminuim 4 Al + 3 O2 = 2 Al2O3 It means for every 4 Aluminium Moles, there are 2 Al2O3 moles. Now, you have 100 gm of Al and you noe Moles= Mass/Molar mass Moles= 100gm/ 27gm/mol =3.7mol 4 Moles of Al gives 2 Moles of Al2O3 3.7 Moles gives (2/4)*3.7 mol...

No problem

2 AgNO3 + CuCl2 = 2 AgCl + Cu(NO3)2 similar mistake with AgCl

-Sharan