Creating chemPad Answer Keys

Subscript

_ (underscore)

H_{2}O

H2O

Superscript

^ (caret)

Ca^{2+}

Ca2+

Electron configuration

See examples.

1s^{2} 2s^{2} 2p^{5}
[He] 2s^{2} 2p^{5}

1s2 2s2 2p5

[He] 2s2 2p5

Combining subscripts and superscripts

See examples.

SO_{4}^{2-}
[Co(SCN)_{2}(H_{2}O)_{4}]
^{+}
^{233}_{91}Pa

SO42-

[Co(SCN)2(H2O)4]+

Forward reaction arrow

-->

2 H_{2}O_{2} --> 2 H_{2}O 
+ O_{2}

2 H2O2 → 2 H2O + O2

Equilibrium reaction

<=>

N_{2}(g) + O_{2}(g) <=> 2 
NO(g)

N2(g) + O2(g) ⇌ 2 NO(g)

Reverse reaction arrow

<--

4 NO(g) + O_{2}(g) <-- 
2 N_{2}O_{3}(g)

4 NO(g) + O2(g) ← 2 N2O3(g)

States of matter

(g)
(l)
(s)

CH_{4}(g) + 4 S(s) -->

CS_{2}(l) + 2 H_{2}S(
g)

CH4(g) + 4 S(s) → CS2(l) + 2 H2S(g)

Lowercase Greek letters

The lowercase letter name

^{0}_{-1}beta

Uppercase Greek letters

The capitalized letter name

DeltaH_{f}

ΔHf

Stacked fraction

/

K_{c} = [COCl] . [Cl] / 
[CO] . [Cl_{2}]

Multiplication or solvate dot (·)

. (period)

Delimiters between items in rank-order questions

>
<
=

K < P < Br

K < P < Br

Delimiters between items in an unordered list

,

HClO, H^{+}, ClO^{-}

HClO, H+, ClO-

Phase boundary, salt bridge (electrochemical cell)

|, ||

Zn(s) | Zn^{2+}(aq) || 
Ag^{+}(aq) | Ag(s)

Zn(s) | Zn2+(aq) || Ag+(aq) | Ag(s)

None (no solution)

(Students enter NONE instead of leaving answer box empty)

NONE

NONE

NONE