Hi people,
I'm trying to solve the following problems:
Problem 1:
1) How many grams HCl with mass fraction ω=36,5 % will fully dissolve 6 g Mg?
2) What's the mass fraction ω of MgCl2 in the formed solution?
For 1) I've calculated that 18,25 g HCl will fully react 6 g Mg - is this correct?
For 2) will the MgCl2 solution have ω=36,5 %? - is this correct?
Problem 2:
How many grams HCl with ω=30 % are needed to neutralise 500 ml NaOH solution with density ρ=1,2 g/ml and ω(NaOH)=10 %?
My calculations give 182,5 g HCl needed to neutralise the given amount of NaOH - is this correct?
Thanks for verifying and helping in advance.
Greetings,
Ned
Calculation problem
Moderators: Xen, expert, ChenBeier
- ChenBeier
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Re: Calculation problem
1) you calculated the 100% of HCl, not 36,5%
Second one is also wrong
2) is correct
Second one is also wrong
2) is correct
Re: Calculation problem
Yes, many thanks @ChenBeier - meantime I realised my mistake and corrected - it should be for 1) 50 g solution of HCl, and for 2) 42,8 % MgCl2
Greetings,
Ned
Greetings,
Ned
- ChenBeier
- Distinguished Member
- Posts: 1565
- Joined: Wed Sep 27, 2017 7:25 am
- Location: Berlin, Germany
Re: Calculation problem
Now it is correct.