salt water salinity

***Beanie*** · 27th May 2008, 10:18

whats the slinity of salt water ie the sea?

what I want to know is how much salt to add to a litre of water to make a seawater subsitute

thanks

Nemo1957 · 27th May 2008, 10:19

37 parts per million on average.

SkinAndScuba · 27th May 2008, 10:36

Quote: (Originally Posted by Beanie)

whats the slinity of salt water ie the sea?

what I want to know is how much salt to add to a litre of water to make a seawater subsitute

thanks

Calculation as per mass 1L fresh water = 1000 grams and sea water on average 1L = 1025 grams add 25 grams of salt to every 1L of fresh water you want to convert.

***jradomski*** · 27th May 2008, 11:26

Quote: (Originally Posted by Beanie)

whats the slinity of salt water ie the sea?

what I want to know is how much salt to add to a litre of water to make a seawater subsitute

thanks

It depends on whose salt water that you want to simulate.. salt content is highest in the tropics and lower in the notherns/southern extremes..

go to the red sea and its VERY salty!

the mopst commonon standard is a specific gravity of 1.035 g/l (not 1.025)

this translates to 35 grams of salt per 1000 grams of water

the open ocean range for the world is 32-38 PSU

dave t · 27th May 2008, 12:05

in the channel its about 1.018 1.020 depending how close to fresh water runoff you are. Red sea is between 1.030 and 1.035. those figures are acording to my hydrometer.

you cant just make sea water by adding table salt, it needs to be a spesific salt mix to replicate seawater

***Beanie*** · 27th May 2008, 12:21

thanks

I suppose saying I wanted to find out how well it conducts electricity might help.

Have a daft experiment I want to try.

dave t · 27th May 2008, 12:34

you can buy synthetic sea salt from the aquarium shops to make proper seawater. I use it all the time in my reef aquarium

HTH

Dave

Drmike · 27th May 2008, 13:19

how to make sea water:

take one empty container
lower it into the sea
remove said container

you now have a container of sea water

***Beanie*** · 27th May 2008, 13:24

Quote: (Originally Posted by Drmike)

how to make sea water:

take one empty container
lower it into the sea
remove said container

you now have a container of sea water

Ha Ha

I can do that for my fresh comparison

Will see if I can get real sea water depends if my dad will be so kind when he goes sailing next week

PaulTG2 · 27th May 2008, 13:45

Quote: (Originally Posted by Beanie)

thanks

I suppose saying I wanted to find out how well it conducts electricity might help.

Have a daft experiment I want to try.

Hello,

Perhaps this might help. I found it at http://people.seas.harvard.edu/~jones/es154/lectures/lecture_2/Ohm'sLaw/Ohm'sLaw.html

Since it was on the internet it must be true:

The Resistivity of Several Natural Elements and Compounds

Substance: Resistivity (r) (ohm-meter)

Diamond: as high as 1014
Mica:9 x 1012 - 1 x 1014
Rock Salt:30 - 1 x 1013
Calcite:2 x 1012
Quartz:4 x 1010 - 2 x 1014
Limestones (dense): 2 x 103 - >106
Diabase (an altered basalt):20 - 5 x 107
Sphalerite:1.5 - 1 x 107
Ground Water:0.5 - 300
Sea Water: 0.2
Galena: 3 x 10-5 - 3 x 102
Pyrite: 2.9 x 10-5 - 1.5
Copper: 1.7 x 10-8

27th May 2008, 10:18	#1 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	salt water salinity whats the slinity of salt water ie the sea? what I want to know is how much salt to add to a litre of water to make a seawater subsitute thanks __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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27th May 2008, 10:19	#2 (permalink)
Nemo1957 New Member Current Rebreather/s: Optima Other Rebreather/s: Join Date: Apr 2006 Location: New York Posts: 78	Re: salt water salinity 37 parts per million on average.
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27th May 2008, 10:36	#3 (permalink)
SkinAndScuba New Member Current Rebreather/s: Optima Other Rebreather/s: Optima Join Date: Oct 2006 Location: South Africa Three Rivers Posts: 40	Re: salt water salinity Quote: (Originally Posted by Beanie) whats the slinity of salt water ie the sea? what I want to know is how much salt to add to a litre of water to make a seawater subsitute thanks Calculation as per mass 1L fresh water = 1000 grams and sea water on average 1L = 1025 grams add 25 grams of salt to every 1L of fresh water you want to convert. __________________ Kenneth Wessels #19799 Skin & Scuba The only South African Optima diver 2007/01-2008/07, and to my knowledge the only Africa Optima diver.
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27th May 2008, 11:26	#4 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,897	Re: salt water salinity Quote: (Originally Posted by Beanie) whats the slinity of salt water ie the sea? what I want to know is how much salt to add to a litre of water to make a seawater subsitute thanks It depends on whose salt water that you want to simulate.. salt content is highest in the tropics and lower in the notherns/southern extremes.. go to the red sea and its VERY salty! the mopst commonon standard is a specific gravity of 1.035 g/l (not 1.025) this translates to 35 grams of salt per 1000 grams of water the open ocean range for the world is 32-38 PSU __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 27th May 2008 at 11:36.
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27th May 2008, 12:05	#5 (permalink)
dave t Custom Title Allowed! Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss Dolphin Ray Azimuth Home Build Other Rebreather/s: Dolphin Ray Azimuth Home Build Join Date: May 2005 Location: UK Posts: 654	Re: salt water salinity in the channel its about 1.018 1.020 depending how close to fresh water runoff you are. Red sea is between 1.030 and 1.035. those figures are acording to my hydrometer. you cant just make sea water by adding table salt, it needs to be a spesific salt mix to replicate seawater
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27th May 2008, 12:21	#6 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	Re: salt water salinity thanks I suppose saying I wanted to find out how well it conducts electricity might help. Have a daft experiment I want to try. __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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27th May 2008, 12:34	#7 (permalink)
dave t Custom Title Allowed! Current Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Classic Kiss Dolphin Ray Azimuth Home Build Other Rebreather/s: Dolphin Ray Azimuth Home Build Join Date: May 2005 Location: UK Posts: 654	Re: salt water salinity you can buy synthetic sea salt from the aquarium shops to make proper seawater. I use it all the time in my reef aquarium HTH Dave
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27th May 2008, 13:19	#8 (permalink)
Drmike Custom Title Allowed! Current Rebreather/s: MK 15.X Ouroboros Other CCR Home Build Other Rebreather/s: Inspiration Classic Other CCR Home Build Join Date: Feb 2005 Posts: 3,163	Re: salt water salinity how to make sea water: take one empty container lower it into the sea remove said container you now have a container of sea water __________________ Cave diving is a sport Wreck diving is a sport Diving in general is a sport 'Rebreather diving' is not a sport its the delusional obsession with a highly dangerous and often inappropriate piece of equipment
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27th May 2008, 13:24	#9 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	Re: salt water salinity Quote: (Originally Posted by Drmike) how to make sea water: take one empty container lower it into the sea remove said container you now have a container of sea water Ha Ha I can do that for my fresh comparison Will see if I can get real sea water depends if my dad will be so kind when he goes sailing next week __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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27th May 2008, 13:45	#10 (permalink)
PaulTG2 Custom Title Allowed! Current Rebreather/s: Megalodon Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Mar 2006 Location: Virginia, USA Posts: 400	Re: salt water salinity Quote: (Originally Posted by Beanie) thanks I suppose saying I wanted to find out how well it conducts electricity might help. Have a daft experiment I want to try. Hello, Perhaps this might help. I found it at http://people.seas.harvard.edu/~jones/es154/lectures/lecture_2/Ohm'sLaw/Ohm'sLaw.html Since it was on the internet it must be true: The Resistivity of Several Natural Elements and Compounds Substance: Resistivity (r) (ohm-meter) Diamond: as high as 1014 Mica:9 x 1012 - 1 x 1014 Rock Salt:30 - 1 x 1013 Calcite:2 x 1012 Quartz:4 x 1010 - 2 x 1014 Limestones (dense): 2 x 103 - >106 Diabase (an altered basalt):20 - 5 x 107 Sphalerite:1.5 - 1 x 107 Ground Water:0.5 - 300 Sea Water: 0.2 Galena: 3 x 10-5 - 3 x 102 Pyrite: 2.9 x 10-5 - 1.5 Copper: 1.7 x 10-8 __________________ Paul's first law states that the safety of an activity is determined by how forgiving of mistakes the activity is. Paul's second law states that the difference between an adventurer and an explorer is whether the doing or the learning comes first. Last edited by PaulTG2 : 27th May 2008 at 13:49. Reason: Format Adjustement
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