m(ZnO) - ?
m (HCl) - ?
w(HCl) = 5%
m(ZnCl) = 13,64 gram
first step: what is your balanced equation?
then start using moles.
this is the exercice he didn t give me the balanced equation but i think it s like that
ZnO + hcl --->zncl + ho
Your effort has a good start, shows you have an idea what's needed, but,
to balance equations, you have to know what the possible products are.
For example, HO and ZnCl are not known products to me.
If you lookup/Google Zinc Chloride, and Hydrogen Oxide, you will find the proper name (together with a laugh) and chemical composition of each product.
Then the next step is to balance the equation, mathematically.
Please proceed, and post if you have difficulties.
it s really hard how can i find the equation ??please help me
ZnO + 2HCl ---> ZnCl2 + H2O
By the way H2O is ......
Zn = 65 g/mol
O = 16 g/mol
H = 1 g/mol
Cl =35.5 g/mol
13.64 g ZnCl2 * 1 mol/(65+71)g
= mols of ZnCl2
now you should be able to continue.
oh that s cool thank u very much i will continue
To find the masses of zinc oxide (ZnO) and hydrochloric acid (HCl), we can use the given information about the weight percent of HCl and the mass of zinc chloride (ZnCl) formed.
First, let's calculate the mass of HCl using the weight percent (w(HCl)):
1. Convert the weight percent to a decimal:
w(HCl) = 5% = 0.05
2. Calculate the mass of HCl:
m(HCl) = w(HCl) * m(ZnCl)
= 0.05 * 13.64 grams
= 0.682 grams
So, the mass of HCl is 0.682 grams.
Now, let's find the mass of zinc oxide (ZnO):
Since we know the mass of ZnCl, we need to first find the molar mass of ZnCl using the periodic table.
The molar mass of ZnCl is:
M(Zn) = 65.38 g/mol (from the periodic table)
M(Cl) = 35.45 g/mol (from the periodic table)
The molar mass of ZnCl can be calculated as:
M(ZnCl) = M(Zn) + M(Cl)
= 65.38 + 35.45
= 100.83 g/mol
Now, using the molar mass of ZnCl, we can find the moles of ZnCl formed:
moles(ZnCl) = m(ZnCl) / M(ZnCl)
= 13.64 grams / 100.83 g/mol
≈ 0.135 moles
Since ZnCl is formed from the reaction of ZnO and HCl, it is important to note that the reaction follows a 1:2 stoichiometry. That means for every 1 mole of ZnO, 2 moles of HCl react to form 1 mole of ZnCl.
So, in this case, the moles of ZnO can be calculated as:
moles(ZnO) = 0.135 moles / 2
= 0.0675 moles
Finally, we can calculate the mass of ZnO using the moles of ZnO and its molar mass.
mass(ZnO) = moles(ZnO) * M(ZnO)
= 0.0675 moles * M(ZnO)
Unfortunately, the molar mass of ZnO is not provided in the given information, so we cannot determine the exact mass of ZnO with the information given. To find the mass of ZnO, we would need to know its molar mass or have additional information.