Alchemy

XP GAIN:

First Brew (water bottle to awkward potion): 15xp per brewed potion (45xp for full stand)
Second Brew (awkward potion to any other potion): 30xp per brewed potion (90exp for full stand)
Third Brew (using either redstone or glowstone): 60xp per brewed potion (180exp for full stand)
Fourth Brew (splash potion via gunpowder): 120xp per brewed potion (360exp for full stand)

Passive Abilities:

Catalysis

Brewing ingredients into potions takes less time the higher your Alchemy skill, beyond level 100.

Concoctions

Concoctions allows brewing of more potions with custom ingredients. Which special ingredients are unlocked is determined by your Rank. There are 8 ranks to unlock.

Potion Name	Potion Effect	Ingredient	Unlock Level	Type	Information
Potion of Water Breathing	Water Breathing	Lilypad	1	Buff	Allows breathing underwater
Potion of Haste	Haste	Carrot	250	Buff	Increases mining speed
Potion of Dullness	Mining Fatigue	Slimeball	250	Debuff	Decreases mining speed
Potion of Absorption	Absorption	Nether Quartz	375	Buff	Applies 2 additional hearts (per level) that disappear upon damage.
Potion of Leaping	Jump Boost	Red Mushroom	375	Buff	Increases jump height
Potion of Health Boost	Health Boost	Apple	500	Buff	Applies 2 refillable hearts per level
Potion of Hunger	Hunger	Rotten Flesh	500	Debuff	Depletes the hunger bar at a faster rate
Potion of Nausea	Nausea	Brown Mushroom	625	Debuff	Makes the user's vision swirl (like entering a Nether portal)
Potion of Blindness	Blindness	Inc Sack	625	Debuff	Decreases the user's range of vision
Potion of Saturation	Saturation	Fern	750	Buff	Causes the user's hunger bar to increase without the consumption of food.
Potion of Decay	Wither	Poisonous Potato	875	Debuff	Damage over time, much like burning or poison.
Potion of Resistance	Resistance	Golden Apple (regular)	1000	Buff	Applies a 20% damage reduction per level

To read this guide on the server type /alchemy ? [page]