Na2SO4 Sodium sulphate; Ca-two-SO-four
Mg (OH) 2 magnesium hydroxide; Mg-pause-OH-pause-twice; Mg-in brackets twice
Ca2 (PO4) 3 • 2H2O calcium phosphate two hydrate; Ca-two-pause-PO four-pause- three times-dot-two-H two-O
[Zn (NH3) 4] 2+ tetra-ammonium zinc complex cation
® give; yield; produce, form, become
evolved as a gas; give off a gas
¯ is precipitated; gives X precipitate
= reacts reversibly
Cu, D in the precence of a copper as a catalyst on heating
CO32- + Ca2 + = CaCO3¯ a carbonate anion with a valancy of two plus a calcium cation with a valancy of two produce a calcium carbonate precipitate
R 'R prime
R â€R double prime, R second prime
R1 R sub one
100 ° C one hundred degrees Centigrade
+ plus; positive
-minus; negative
´ multiplied by; times
¸ divided by
± plus or minus
= is equal to; equals
º is identically equal to
»Is approximately equal to
() round brackets; parentheses
[] square brackets
{} braces
a >> ba is much greater than b
a³ ba is greater than or equal to b
aµ ba varies directly as b
lognX logX to the base n
the cubic root of x
the nth root of x
x2 x square, x squared, the square of x
Xn X to n factors; the nth power of x; x to the power n
x -8 x to the minus eighth power
ï xï the absolute value of x
the mean value of X
the sum of the terms indicated; summation of
D x or dx the increment of x
dx differential x
dy / dx the first derivative of y with respect to x
ò integral
Â¥ infinity
1/2 a half; one half
2/3 two thirds
5/123 five over a hundred and twenty-three
eight and three over fourths; eight and three quarters
0.01 O point O one; zero point zero one; nought point nought one
6% 6 percent
3 ‰ 3 per mille
2: 3 the ratio of two to three
r = xd r equals x multiplied by d
5´ 2 = 10 five times two equals ten
x3 / 8 = y2 x raised to the third power divided by eight equals y squared
(a + bc´ d) / e = fa plus b minus c multiplied by d, all divided by e equals f
y = (Wt-W) / xy equals W sub t minus W over x
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