32% hydrochloric acid. Converting units problem?

Question

If hydrochloric acid is concentrated at 32%.

In 1 tonne of this, how many grams of HCl would there be?

Is it simply 320,000? or do you have to take into account the difference in density between the HCl and water? Thanks

Answer 1

1 tonne = 1000 kg

32% HCl is 32% by mass ---> 32 g HCl / 100 g solution

so the conversion goes like this....

1 tonne acid x (1000 kg / tonne) x (1000 g / 1 kg) x (32 g HCl / 100 g acid solution) = 320,000 g HCl

density is not part of this problem because the 32% is by mass and the tonne is mass.

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your answer is perfectly WRONG Mr Norrie

although the density of HCl > water as you wrote...

32% of 1 tonne = .32 tonne right?  .. now convert that to kilograms → 320 kg right?

Why on earth would you multiply that by SG ?

Answer 2

It'll be a little more than 320kg as follows...

The density of 32% HCl is 1.149 g/mL.

= 1.149 (Specific Gravity)

32% as a decimal = 32% / 100% = 0.32.

1tonne = 1,000kg = (1,000kg x 0.32) x 1.149. S.G.

= 367.7kg = 367,700 grams HCl.

This Mr. m w is perfectly correct. HCl has a greater density than water.

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