# Formulas Poker - Experiment 26

Students can practice writing chemical formulas in a game.

**Materials**

Each deck should contain:

- At least one card with each of the following ions(47cards):

Ba ^{+2}

Na^{+1}

Ca^{+2}

Li^{+1}

Pb^{+2}

Zn^{ +2}Be ^{ +2 }

Mg^{ +2}

Ag^{ +1}

K^{ +1}

V^{ +3}

Ni^{ +3}Cu ^{ +2}

Cu^{ +3}

Fe^{ +2}

H^{ +1}

Fe^{ +3}Sr ^{+2}

Sc^{ +3}

Al^{ +3}

Hg^{ +2}

Sn^{ +1}

Rb^{ +1}NO3 ^{ -1}

NO2^{-1}

SO4^{-2}

SO3^{ -2}

HSO4^{ -1}

CO3^{-2}HCO3 ^{ -1}

PO4^{-3 }

HPO4^{-2}

NH4^{+1}

OH^{ -1}

ClO4^{-1}CrO4 ^{ -1}

Cl^{ -1 }

AsO4^{-2}

C2H3O2^{ -1}

H2PO4^{-1 }

I^{ -1}S ^{ -2 }

O^{ -2}

F^{ -1}

N^{-3}

Br^{ -1}

P^{ -3}

**Procedure**

- This game is played as a 5-card draw. The dealer will pass out 5 cards to each player from the shuffled deck, placing all remaining cards in a central stack.
- Each player may discard as many as 3 cards in one rotation—taking as many cards from the central stack as s/he discards. Play begins with the player to the right of the dealer. Players try to make a chemical formula that uses as many of their cards as possible. If they cannot play, they must pass. It is possible to make two chemical formulas in one play. Once a player uses a number of cards to make a formula, that player should draw, from the central stack, as many cards as s/he used. Play then passes to the player on the right.
- Total the score by the number of cards that a player is able to use to make a chemical formula. It is possible for a player to score as many as 5 points per hand. See Sample Score sheet. Each player has her/his own score sheet.
- Play continues until no more formulas can be made.