Reef Chemistry Questions of the Day!

Randy Holmes-Farley · Sep 9, 2017

For those of you who don't frequent the chemistry forum but might want to try your hand at some reef chemistry trivia questions, here are links to them all. I give the answers in each of them, and sometimes there's debate.

They range from moderate to difficult, and serious (most of them) to rather speculative.

Reef Chemistry Question of the Day 217 Elements and Specific Gravity

Reef Chemistry Question of the Day 216 Seawater Barometer

Reef Chemistry Question of the Day 215 Metals in Chlorophyll

Reef Chemistry Question of the Day 214 Two Part Additive Systems

Reef Chemistry Question of the Day 213 Evaporation and Other Gases

Reef Chemistry Question of the Day 212 Dissolved Oxygen and Helium

Reef Chemistry Question of the Day 211 ORP and Additives

Reef Chemistry Question of the Day 210 Limewater/Kalkwasser Long Term Use

Reef Chemistry Question of the Day 209 Weight of Salt Water

Reef Chemistry Question of the Day 208 Suspended vs Surface bacteria

Reef Chemistry Question of the Day 207 Allotropes in the Reef Aquarium

Reef Chemistry Question of the Day 206 The "ate" suffix

Reef Chemistry Question of the Day 205 Magnesium Supplement

Reef Chemistry Question of the Day 204 Alkalinity Testing

Reef Chemistry Question of the Day 203 Effect of Using Nitrate

Reef Chemistry Question of the Day 202 Silica accumulating organisms

Reef Chemistry Question of the Day 201 Offgassing of reef tanks

Reef Chemistry Question of the Day 200 Calcification and The Big Three Parameters

Reef Chemistry Question of the Day 199 Trace element form

Reef Chemistry Question of the Day 198 Magnesium Consumption

Reef Chemistry Question of the Day 197 Boiling Point of Seawater

Reef Chemistry Question of the Day 196 What happens to carbon dioxide in the ocean?

Reef Chemistry Question of the Day 195 Alkalinity Additives

Reef Chemistry Question of the Day 194 Low ORP in New Salt Water

Reef Chemistry Question of the Day 193 Membrane Penetration

Reef Chemistry Question of the Day 192 Cycling and Alkalinity

Reef Chemistry Question of the Day 191 Settling of Organic Dosing Compounds

Reef Chemistry Question of the Day 190 Evaporation and TDS

Reef Chemistry Question of the Day 188 Dr Who and Evaporation 2!

Reef Chemistry Question of the Day 187 Dr Who and Evaporation!

Reef Chemistry Question of the Day 186 Magnesium Supplements

Reef Chemistry Question of the Day 185 Macroalgae and Nutrient Uptake

Reef Chemistry Question of the Day 184 Precipitating Additives

Reef Chemistry Question of the Day 183 A Supersaturated Organic Molecule in the Ocean

Reef Chemistry Question of the Day 182 Soda Water and Reef Tanks

Reef Chemistry Question of the Day 181 Weather and Reef Tanks

Reef Chemistry Question of the Day 180 Lugols iodine

Reef Chemistry Question of the Day 179 Refractometer ATC

Reef Chemistry Question of the Day 178 Limewater (Kalkwasser) Cloudiness

Reef Chemistry Question of the Day 177 Ethanol Refractometer

Reef Chemistry Question of the Day 176 Colors of chemicals

Reef Chemistry Question of the Day 175 Ion Concentration

Reef Chemistry Question of the Day 174 pH Buffering

Reef Chemistry Question of the Day 173 Dissolved Gases in Seawater

Reef Chemistry Question of the Day 172 Phosphate on Calcium Carbonate

Reef Chemistry Question of the Day 171 Sodium Hydroxide Dosing

Reef Chemistry Question of the Day 170 Atomic Weight

Reef Chemistry Question of the Day 169 Reactions of Ozone

Reef Chemistry Question of the Day 168 Iron

Reef Chemistry Question of the Day 167 General Hardness

Reef Chemistry Question of the Day 166 Organic Carbon Dosing

Reef Chemistry Question of the Day 165 Salinity of Skimmate

Reef Chemistry Question of the Day 164 TDS and Ions

Reef Chemistry Question of the Day 163 Unknown Molecule

Reef Chemistry Question of the Day 162 Calcium Carbonate Precipitation

Reef Chemistry Question of the Day 161 Using a Syringe

Reef Chemistry Question of the Day 160 Reading a Floating Glass Hydrometer

Reef Chemistry Question of the Day 159 Measuring Volume

Reef Chemistry Question of the Day 158 Iron in the Ocean

Reef Chemistry Question of the Day 157 Limewater/kalkwasser

Reef Chemistry Question of the Day 156 Sea Urchin Color

Reef Chemistry Question of the Day 154 Ion Abundance

Reef Chemistry Question of the Day 153 Limewater (kalkwasser)

Reef Chemistry Question of the Day 152 Feel of Water

Reef Chemistry Question of the Day 151 Yellow Tang Coloration

Reef Chemistry Question of the Day 150 Evaporation

Reef Chemistry Question of the Day 148 Surface Area

Reef Chemistry Question of the Day 147 Heat Dissipation

Reef Chemistry Question of the Day 146 Solubility as a Function of Temperature

Reef Chemistry Question of the Day 145 Alkalinity Effects of Chemicals

Reef Chemistry Question of the Day 144 What makes the oceany smell?

Reef Chemistry Question of the Day 143 RO Membrane Rejection

Reef Chemistry Question of the Day 142 Food Sources of N and P

Reef Chemistry Question of the Day 141 Magnesium Solubility

Reef Chemistry Question of the Day 140 Total Alkalinity

Reef Chemistry Question of the Day 139 Organic Molecules

Reef Chemistry Question of the Day 138 Teaspoons and Tablespoons

Reef Chemistry Question of the Day 137 Bicarbonate Concentration

Reef Chemistry Question of the Day 136 Diffusion of oxygen in water

Reef Chemistry Question of the Day 135 Speed of diffusion of molecules

Reef Chemistry Question of the Day 134 Speed of molecules

Reef Chemistry Question of the Day 133 pH effect of ions

Reef Chemistry Question of the Day 132 Ions in Potato Chips

Reef Chemistry Question of the Day 131 Floating Glass Hydrometer

Reef Chemistry Question of the Day 130 Portuguese Man-of-War

Reef Chemistry Question of the Day 129 Strontium

Reef Chemistry Question of the Day 128 Elements in Polyethylene

Reef Chemistry Question of the Day 127 Halides in metal halide lamps

Reef Chemistry Question of the Day 126 Aluminum Oxide

Reef Chemistry Question of the Day 125 Coral Skeleton Dissolution

Reef Chemistry Question of the Day 124 Units of measure

Reef Chemistry Question of the Day 123 Party Effect on Aquariums

Reef Chemistry Question of the Day 122 Calcium Supplement

Reef Chemistry Question of the Day 121 Alkalinity and mixing

Reef Chemistry Question of the Day 120 Nitrate and water change

Reef Chemistry Question of the Day 119 Limewater

Reef Chemistry Question of the Day 118 Carbonate species

Reef Chemistry Question of the Day 117 Sodium and Chloride in Seawater

Reef Chemistry Question of the Day 116 Nitrite structure

Reef Chemistry Question of the Day 114 GFO and CaCO3 precipitation

Reef Chemistry Question of the Day 114 Sea Urchins

Reef Chemistry Question of the Day 113 Calcium and Alkalinity in One Additive

Reef Chemistry Question of the Day 112 Skimming

Reef Chemistry Question of the Day 111 Ozone Chemistry

Reef Chemistry Question of the Day 110 Dolomite

Reef Chemistry Question of the Day 109 CaCO3/CO2 Reactors

Reef Chemistry Question of the Day 108 Two Part Recipe

Reef Chemistry Question of the Day 107 Halides

Reef Chemistry Question of the Day 106 Water Concentration

Reef Chemistry Question of the Day 105 Limitation of Algae Growth

Reef Chemistry Question of the Day 104 Alkalinity

Reef Chemistry Question of the Day 103 Water Change Efficiency

Reef Chemistry Question of the Day 102 Organic Compound Definition

Reef Chemistry Question of the Day 101 Bicarbonate/carbonate

Reef Chemistry Question of the Day 100 Chemicals that impact ORP

Reef Chemistry Question of the Day 99 TDS

Reef Chemistry Question of the Day 98 RO Membrane Penetration

Reef Chemistry Question of the Day 97 Potential Depletion Rates

Reef Chemistry Question of the Day 96 Calcium Carbonate Solubility

Reef Chemistry Question of the Day 95 Surface Ocean Depletion

Reef Chemistry Question of the Day 94 Calcium and Alkalinity

Reef Chemistry Question of the Day 93 Element Ratios

Reef Chemistry Question of the Day 92 Hydrogen Sulfide

Reef Chemistry Question of the Day 91 Baking Soda 3

Reef Chemistry Question of the Day 90 Baking Soda 2

Reef Chemistry Question of the Day 89 Nanotanks

Reef Chemistry Question of the Day 88 Baking Soda 1

Reef Chemistry Question of the Day 87 Phosphate and water changes

Reef Chemistry Question of the Day 86 Deionizing resins

Reef Chemistry Question of the Day 85 Units of mixing

Reef Chemistry Question of the Day 84 CaCO3/CO2 reactors

Reef Chemistry Question of the Day 83 Carbonate Ion Pairs

Reef Chemistry Question of the Day 82 Heavy Elements

Reef Chemistry Question of the Day 81 Conductivity of Pure Water

Reef Chemistry Question of the Day 80 pH

Reef Chemistry Question of the Day 79 Magnesium Supplements

Reef Chemistry Question of the Day 78 Sodium Silicate

Reef Chemistry Question of the Day 77 Calcium

Reef Chemistry Question of the Day 76 Halides

Reef Chemistry Question of the Day 75 Precipitation of Calcium Carbonate

Reef Chemistry Question of the Day 74 Frozen Seawater

Reef Chemistry Question of the Day 73 Altitude 2: pH

Reef Chemistry Question of the Day 72 Altitude 1: oxygen

Reef Chemistry Question of the Day 71 Thanksgiving Edition

Reef Chemistry Question of the Day 70 Calcium and Alkalinity

Reef Chemistry Question of the Day 69 Lysocline

Reef Chemistry Question of the Day 68 Water Changes and Sump Size

Reef Chemistry Question of the Day 67 Evaporation

Reef Chemistry Question of the Day 66 pH and Ions

Reef Chemistry Question of the Day 65 Refractometer and Ion Imbalances

Reef Chemistry Question of the Day 64 Lugol's Iodine

Reef Chemistry Question of the Day 63 Gas Exchange 4 CO2 and the Superbowl

Reef Chemistry Question of the Day 62 Gas Exchange 3 Photosynthesis

Reef Chemistry Question of the Day 61 Gas Exchange 2

Reef Chemistry Question of the Day 60 Gas Exchange 1

Reef Chemistry Question of the Day 59 Soda water

Reef Chemistry Question of the Day 58 Molecular Weight

Reef Chemistry Question of the Day 57 Limewater (kalkwasser)

Reef Chemistry Question of the Day 56 Fluoride mg/L = ? ppm

Reef Chemistry Question of the Day 55 Salinity Rise from Calcium

Reef Chemistry Question of the Day 54 Denitrification

Reef Chemistry Question of the Day 53 Boron

Reef Chemistry Question of the Day 52 Chemical Evaporation

Reef Chemistry Question of the Day 51 Ion analogy

Reef Chemistry Question of the Day 50 Dolomite

Reef Chemistry Question of the Day 49 Micro unit

Reef Chemistry Question of the Day 48 Epsom Salt

Reef Chemistry Question of the Day 47 Ion Abundance

Reef Chemistry Question of the Day 46 General Hardness

Reef Chemistry Question of the Day 45 Brain Teaser on Salt Solutions

Reef Chemistry Question of the Day 44 ppm-N units

Reef Chemistry Question of the Day 43 pH and Mixing

Reef Chemistry Question of the Day 42 GFO

Reef Chemistry Question of the Day 41 dKH word origin

Reef Chemistry Question of the Day 40 Water weight

Reef Chemistry Question of the Day 39 pH of Hydroxides

Reef Chemistry Question of the Day 38 Concentrated Seawater

Reef Chemistry Question of the Day 37 RO/DI

Reef Chemistry Question of the Day 36 Pure Calcium

Reef Chemistry Question of the Day 35 Mollusk Teeth

Reef Chemistry Question of the Day 34 Limewater (kalkwasser)

Reef Chemistry Question of the Day 33 Calcium Carbonate Solubility

Reef Chemistry Question of the Day 32 Precipitate

Reef Chemistry Question of the Day 31 Hyposalinity

Reef Chemistry Question of the Day 30 Chemical Layering

Reef Chemistry Question of the Day 29 Hydrometer

Reef Chemistry Question of the Day 28 Toxic?

Reef Chemistry Question of the Day 27 ‰

Reef Chemistry Question of the Day 26 Hydrogen Sulfide 2

Reef Chemistry Question of the Day 25 Hydrogen Sulfide 1

Reef Chemistry Question of the Day 24 Calcium Concentration

Reef Chemistry Question of the Day 23 Sea Urchin Spines

Reef Chemistry Question of the Day 22 Calcium Carbonate Solubility

Reef Chemistry Question of the Day 21 Reverse Osmosis Membranes

Reef Chemistry Question of the Day 20 Ozone

Reef Chemistry Question of the Day 19 Buffering Capacity

Reef Chemistry Question of the Day 18 Magnesium

Reef Chemistry Question of the Day 17 Alkalinity Definition

Reef Chemistry Question of the Day 16 Where does the salt in the ocean come from?

Reef Chemistry Question of the Day 15 The specific gravity of seawater is...

Reef Chemistry Question of the Day 14 Alkalinity

Reef Chemistry Question of the Day 13 Light Absorption by Water

Reef Chemistry Question of the Day 12 Ammonia in Shipping vs Aquarium

Reef Chemistry Question of the Day 11 Iodine Forms

Reef Chemistry Question of the Day 10 Negatively Charged ions in Seawater

Reef Chemistry Question of the Day 9 Surface Scum on Limewater

Reef Chemistry Question of the Day 8 Boosting Magnesium

Reef Chemistry Question of the Day 7 Magnesium in Limewater

Reef Chemistry Question of the Day 6 Phosphate Forms

Reef Chemistry Question of the Day 5 Refractometer

Reef Chemistry Question of the Day 4 Salinity Rise with Two Part

Reef Chemistry Question of the Day 3 Positively Charged Ions

Reef Chemistry Question of the Day 2 Four Most Abundant Ions in Seawater

Reef Chemistry Question of the Day 1 Vodka vs Vinegar