Mrs SLVA is a medical lab assistant
and had to make up some solution or other. A bio-medical scientist (BMS) told her it's a 1:2 solution.

Wife: "So, 100ml of chemical to 200ml of water?"
BMS: "No, 100ml of each"
Wife: "But that's a 1:1 solution"
BMS: "No, it's a 1:2 solution, you use 100ml of chemical and you get 200ml of solution"
Wife: "That's not how ratios work. 1:2 means 100ml of chemical and 200ml of water"
BMS: "no it isn't"
Wife: "Yes it is."
BMS: "No it isn't" (with an air of I've got a degree in medical science and get paid way more than you do.)
Wife: "Ok, so what amounts would make a 1:1?" (with an air of I know what I'm fucking talking about and I've only got a C at GCSE Biology and a D in maths)

Mrs SLVA face-palmed so much that she's actually beaten her face into the shape of a wok.
( sandettie light vessel automatic New Twitter - @bollocksreally, Wed 9 Sep 2009, 18:09, 3 replies, latest was 16 years ago)

oh god
she should have made up a 1:2 solution and left the pillock to it!
unless he meant a 1 in 2 solution? which would make a bit more sense. Still, a twat.
We had a lab tech who thought a 10 % solution meant 100g in 100 ml, so that took a LOT of explaining. But she was a total muppet, and used to get acids and alkalis confused too. (top tip I told her - if the bottle says ACID, it's probably not an alkali...)
( ascorbate, Wed 9 Sep 2009, 19:05, Reply)

Hmm
A 1 in 2 solution is one part in a total of two parts. A 1:2 solution is one part TO two parts, eg, total of three.
So says I, fellow lab medical type person. Your wifes boss needs a slap and possibly a maths lesson.
(berk, Wed 9 Sep 2009, 23:08, Reply)

I sometimes teach ratio
they way we teach it is show things like coloured cubes, 3 of them are blue and 2 of them are green. There are 5 parts in total. 3 parts blue, two parts green. Ratio of 3:2.

The solution she was making consists of 3 parts. So 1 part chemical to 2 parts water.
( Mrs Entity is in hiding., Wed 9 Sep 2009, 23:18, Reply)