a bottle of concerntrated HCL (36.5) was labelled as 37%
(w/w) and density 1.19m/l.What is hcl molarity?
- 8 Answers
- 39092 Views
- I also Faced
- E-Mail Answers
Answer Posted / dave
37% (w/w) implies 37g of HCl in 100 g of solution.
37g is 37/36.5 = 1.01 moles HCl.
However, this is dissolved in 100 g of solution not 100 mL of solution. The actual volume present can be determined from the density of 1.19 g/mL.
100 g/V mL = 1.19, therefore the actual solution volume is 100/1.19 = 84 mL.
The concentration is 1.01/84 mol/ml = 0.012 mol/ml
Or, in mol/L this is 1000 x 0.012 = 12 mol/L.
If this had been 37% (w/v) this would have been 37 g HCl in 100 mL solution and no correction for density would have been needed. The concentration in that case would have been 10.1 mol/L
| Is This Answer Correct ? | 8 Yes | 0 No |
Post New Answer View All Answers
In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?
What is third generation HPLC Columns?
if you have given one product then how you determine the impurity in that?
which are the sizes of capsules?
For standardization of volumetric solutions, acceptance limit for concentration is considered as 10% of nominal concentration and %RSD as NMT 0.2% (for appropriate no. of replicates). But , if %RSD has not met, what should be further action?
what is difference in ods I ods II is this is realy from sorbent / packing characteristics or from other means
if tech transfer fails whay require to do?
How do we fix the sample concentaryion in hplc method development. What is the basis?
In rs method development when we are going area normalization method to dilute standard method?
in which situation require to take incident in validation?
What is the purpose of octyl silane columns?
how you fix the limits of impurities?
In HPLC (Waters) software Empower1,2 &3 what is the updation for each version
what is the purge flow & how to calculate
for inorganic molecules require to do RS, Assay and disso?
