Page 356 - Chemistry eBook

H SO (aq) sulfurous acid
sulfuric acid phosphoric acid
carbonic acid ethanoic acid
Table M, Common Acid-Base Indicators
23 H2SO4(aq)
H3PO4(aq)
H2CO3(aq) or
CO2(aq)
60Co 5.271
CH3COOH(aq) or
137Cs
53Fe
220 Fr
3H 131I
30.2 8.51 mi 27.4
12.31 8.021 1.23 12.36 10.73
7.13 17.22 14.28 2.410 × 104 1599
3.823
29.1
2.13 × 105
1.40 × 1010
HC2H3O2(aq) (acetic acid) 37K 42
Table L
K
85Kr 16N
19Ne 32P
239Pu 226Ra 222
Common Bases
Reffy, Table M (p. 6): Common Acid-Base Indicators
Formula
NaOH(aq) KOH(aq) Ca(OH) (aq)
Name
sodium hydroxide
potassium hydroxide
2
Rn
calcium hydroxide
This table shows us the color change of different pH levels using different indicators.
• The left column shows the
indicator name.
• The center column shows the
pH range.
• The right column shows the
color change.
NH3(aq) aqueous ammonia
Common Acid–Base Indicators
90Sr
99Tc 232Th
233U
235 U
238 U
Source: CRC Handbook of Che CRC Press
Table M
1.592 × 105 8
Indicator
Approximate pH Range for Color Change
Color Change
methyl orange
3.1–4.4
red to yellow
bromthymol blue
6.0–7.6
yellow to blue
phenolphthalein
8–9
colorless to pink
litmus
4.5–8.3
red to blue
bromcresol green
3.8–5.4
yellow to blue
thymol blue
8.0–9.6
yellow to blue
7.04 × 10 9
4.47 × 10
Source: The Merck Index, 14th ed., 2006, Merck Publishing Group Reference Tables for Physical Setting/Chemistry – 2011 Edition
m
355 © UNIT 9: ACIDS AND BASES