dissolve

New2grammarMix the catalyst in when the temperature drops to 55 degrees Celsious so it [doesn't dissolve/won't dissolve] into the liquid instantly.

1. Is the above correct?
2. Which choice is better?

Thanks.

I spell it Celsius, but I believe your spelling is also used.

I would choose doesn't dissolve, but e

How about the following:

You will have to mix the catalyst in when the temperature drops to 55 degrees Celsious so it [doesn't dissolve/won't dissolve] into the liquid instantly.

Now which choise is better?

New2grammarHow about the following:
You will have to mix the catalyst in when the temperature drops to 55 degrees Celsious so it [doesn't dissolve/won't dissolve] into the liquid instantly.

Now which choise is better?

I still say either, but here I would reverse my choice and choose won't dissolve as being better.

That's interesting! Thanks.

I will attempt to explain my choices:

In the first sentence, it sounds to me like directions/instructions to be followed - do this so that it doesn't .........

In the second it sounds more like information - you will have to ......... so it won't ...

Hope that helps.

Actually, I feel your points are reversed. the simple present sounds more like information to me. Water doesn't boil at 70. Fire does create heat.