Concentration calculations
A solution is prepared by dissolving 12.5g of NaCl in enough water to make 350cm3 of solution.
What is the correct concentration, in mol dm-3, of the solution?
A) 6.11x10-4
B) 3.57x10-2
C) 6.11x10-1
D) 35.7
What is the correct concentration, in mol dm-3, of the solution?
A) 6.11x10-4
B) 3.57x10-2
C) 6.11x10-1
D) 35.7
Original post by itskerry17
A solution is prepared by dissolving 12.5g of NaCl in enough water to make 350cm3 of solution.
What is the correct concentration, in mol dm-3, of the solution?
A) 6.11x10-4
B) 3.57x10-2
C) 6.11x10-1
D) 35.7
What is the correct concentration, in mol dm-3, of the solution?
A) 6.11x10-4
B) 3.57x10-2
C) 6.11x10-1
D) 35.7
solution concentration is measured in moles per litre as shown in the question = mol/volume
Original post by charco
solution concentration is measured in moles per litre as shown in the question = mol/volume
It would be 35.7, as you firstly need to rearrange volume to dm3 as it asks for it in mol/dm3. Then rearrange equation to equal c=n/v..
so 12.5/0.350 = 35.71428571
Original post by RP990
It would be 35.7, as you firstly need to rearrange volume to dm3 as it asks for it in mol/dm3. Then rearrange equation to equal c=n/v..
so 12.5/0.350 = 35.71428571
so 12.5/0.350 = 35.71428571
incorrect
step 1 : convert mass to moles = 12.5/58.5 = 0.2137 mol
step 2 : convert cm3 to dm3 = 0.35 dm3
step 3 : divide mol by vol = 0.611 mol dm-3
Quick Reply
Related discussions
- chemistry
- Titration calculations
- Acids and bases help
- alevel chemistry question
- AQA AS Chemistry 2017 Paper 1 Titration MCQ Q16
- Chemistry question dilution
- Chemistry f325 june 2010 question
- Chem - PH Question
- Isaac Chemistry Questions
- Rate equation question
- Alevel chemistry kw
- chemistry moles question
- about biomedical science
- Initial rates a level chemistry
- Aqa alevel chemistry acids and bases help
- chemistry question
- Volume
- AQA Chemistry A level Ka Question
- Titration paper
- chemistry titration
Latest
Trending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these productsTrending
Last reply 1 week ago
Im confused about this chemistry question, why does it form these products
