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The physics behind my Gin and Tonic

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The physics behind my Gin and Tonic

Old 20th Feb 2022, 23:38
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The physics behind my Gin and Tonic

Why does it all froth up when I dump in the ice?


...and what's the least frothy way to make one?
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Old 21st Feb 2022, 02:52
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Put the ice in the glass. Pour the gin over it. Add tonic, lemon/lime etc., as necessary. Perfect.

From stirred, but never shaken.
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Old 21st Feb 2022, 03:41
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Originally Posted by jolihokistix View Post
Put the ice in the glass. Pour the gin over it. Add tonic, lemon/lime etc., as necessary. Perfect.

From stirred, but never shaken.
+1
Although I've been drifting towards gin and ginger ale instead of gin and tonic. I find the ginger ale gives it a nice, pleasant taste, and unlike tonic there are some good sugar-free ginger ales' out there so I can keep my sugar intake down. In fact, I'm enjoying one right now .
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Old 21st Feb 2022, 05:20
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Originally Posted by Sue Vêtements View Post
Why does it all froth up when I dump in the ice?


...and what's the least frothy way to make one?
You are not supposed to dump in the ice! (Although I have encountered urinals that are packed with ice)

Clean ice, gin, slice of lemming, tonic as you like
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Old 21st Feb 2022, 06:11
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Originally Posted by double_barrel View Post
You are not supposed to dump in the ice! (Although I have encountered urinals that are packed with ice)

Clean ice, gin, slice of lemming, tonic as you like
Enjoy that slice of lemming… I´ll stick to lemon or lime.
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Old 21st Feb 2022, 07:26
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.... and start with a good glass (different correct answer for different people, but it needs to a decent size and 'feel right' in the hand) - preferably pre-chilled in the freezer. My personal preferences are for a highball glass or a goblet (although I view that as 'a bit girlie'.

Always ice first as others have commented - I have taken to squeezing a lime section into the glass and dropping a lime slice in with filtered water to freeze in the base, then dropping more ice cubes on top before pouring gin, twist of lime and tonic in that order. A gentle stir is best in case the copious quantities of ice prevent full mixing (you can't have too much ice in my view -prevents over dilution and can support a mid way top-up or two !
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Old 21st Feb 2022, 07:50
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Ahem...having no social skills...or finesse....I've never really given much thought to the complexities involved. Select glass, or alternative plastic cup, pour in Gin / Tonic, stir with finger ..consume thereafter.

If consuming, rare, but has happened, the pre mixed canned version, pull off ring top, place aperture to lips...slurp down .

It would be fair to say the above philosophy and practices are unlikely to feature in Debretts

The beverage can, I understand, also be used for flavouring albeit it's prudent to do so at room temp...and without the ice.

Last edited by Krystal n chips; 21st Feb 2022 at 08:57.
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Old 21st Feb 2022, 08:16
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Ice, gin, angle the glass to pour the tonic then add either some rosemary or juniper berries.
Ginger ale?! Go wash your mouth!
You’re making a gentleman’s drink not spiked lemonade.
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Old 21st Feb 2022, 08:48
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Why dilute a good gin with tonic?

Gin, ice and a slice of lemon or lime is perfect
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Old 21st Feb 2022, 09:51
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Only sissies use ice. Slugs of gin straight from the bottle…
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Old 21st Feb 2022, 10:13
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I prefer Gin and It or Gin and French. Being winter, no ice. !/3 gin, 1/3 vermouth - French or Italian as preferred, generous squeeze of lime, Angostura if liked and 1/3 tonic. Very good for curing shaking hands if you suffer from BET (Benign Essential Tremors) - which I do.
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Old 21st Feb 2022, 10:25
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Originally Posted by jolihokistix View Post
Only sissies use ice. Slugs of gin straight from the bottle…
Now come on, real gin drinkers only drink it directly from the Carter-Head still at the distillery.
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Old 21st Feb 2022, 12:07
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Easy way... open mouth.. gently pour in the gin, a piece of ice, and top up with gin. close mouth shake the head and swallow like your girlfriend/boyfriend...
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Old 21st Feb 2022, 12:37
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and the physics of why it froths . . .
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Old 21st Feb 2022, 12:40
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Originally Posted by double_barrel View Post
You are not supposed to dump in the ice! (Although I have encountered urinals that are packed with ice)

Clean ice, gin, slice of lemming, tonic as you like

I thought it was a twist of lemming?
Ice in last? Not guilcup your honour.
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Old 21st Feb 2022, 13:19
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Originally Posted by Sue Vêtements View Post
and the physics of why it froths . . .
The ability of a solvent (tonic) to dissolve a solute (Co2) is temperature dependent. If the tonic is saturated with CO2 at room temperature, rapid cooling causes the solute to precipitate out, as bubbles.

Same reason my first Ricard of the morning goes cloudy when adding ice.
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Old 21st Feb 2022, 13:36
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Originally Posted by double_barrel View Post
(Although I have encountered urinals that are packed with ice)
Don't, whatever you do, put it in your drink. It's not ice.
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Old 21st Feb 2022, 13:44
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Originally Posted by DuncanDoenitz View Post
Same reason my first Ricard of the morning goes cloudy when adding ice.
Ice? In Ricard???? Do the authorities know about this?


Mind you, I agree Ricard is better than Pernod - One time I went into a liquor store looking for some, but couldn't find it so had to ask the guy behind the counter. I figured it'd be too confusing to ask for Ricard, so I asked for Pernod instead thinking they'd both be in the same place, He took me directly to that shelf but then had to say "I'm sorry, but we only have Ricard ... so I'll give you five bucks off"
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Old 21st Feb 2022, 14:46
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I'll give it some thought tonight over a glass or two of Laphroaig..........

Rans6............
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Old 21st Feb 2022, 15:01
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Originally Posted by DuncanDoenitz View Post
The ability of a solvent (tonic) to dissolve a solute (Co2) is temperature dependent. If the tonic is saturated with CO2 at room temperature, rapid cooling causes the solute to precipitate out, as bubbles.

Same reason my first Ricard of the morning goes cloudy when adding ice.
Except that gas solubility increases with decreasing temperature (up until the liquid starts to freeze) - the opposite of solubility of solids. So not the explanation unfortunately.

The simpler explanation - the agitation of a saturated CO2 solution. Clumsily pouring tonic into a glass, even without ice, will cause it to froth over the top.
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