Stoichiometry question

Chemistry and homework help forum.

Organic Chemistry, Analytical Chemistry, Biochemistry, Physical Chemistry, Computational Chemistry, Theoretical Chemistry, High School Chemistry, Colledge Chemistry and University Chemistry Forum.

Share your chemistry ideas, discuss chemical problems, ask for help with scientific chemistry questions, inspire others by your chemistry vision!

Please feel free to start a scientific chemistry discussion here!

Discuss chemistry homework problems with experts!

Ask for help with chemical questions and help others with your chemistry knowledge!

Moderators: Xen, expert, ChenBeier

Post Reply
User avatar
Dhamnekar Winod
Distinguished Member
Distinguished Member
Posts: 257
Joined: Sat Nov 21, 2020 10:14 am
Location: Mumbai[Bombay] and Mumbai Suburb,, Maharashtra State,India

Stoichiometry question

Post by Dhamnekar Winod »

For the given balanced reaction: Ca3(PO4)2 + 3 SiO2 + 5 C → 3 CaSiO3 + 5 CO + 2 P
1) How many moles of silicon dioxide are required to react with 0.35 mol of carbon?
2) How many moles of calcium phosphate are required to produce 0.45 mol of calcium silicate?

How to answer both these questions?

Answers provided by author are 1) 1.05 mole of Silicon dioxide(SiO2)

2) 0.15 ol of Calcium Silicate(Ca3(PO4)2

I don't understand how these answers are computed?
Any science consists of the following process. 1) See 2)Hear 3)Smell,if needed 4)Taste, if needed 5)Think 6)Understand 7)Inference 8)Take decision [Believe or disbelieve, useful or useless, true or false, cause or effect, any other criteria]
User avatar
ChenBeier
Distinguished Member
Distinguished Member
Posts: 1541
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

Re: Stoichiometry question

Post by ChenBeier »

No. 1 is wrong

The ratio between carbon and silicondioxide is 5:3 what means 0.35 mol C correspond to 0.21 mol SiO2.

No. 2 is correct

Calculation in the same way as above.
Post Reply