I would also appreciate any information on using just calcite as classroom chalk... From what I understand, calcium carbonate is simply
too hard to use on modern blackboards.
Re: Pitmans Miller Time ... The formation of the chalk layers in the ... |>England and the southern North Sea basin are? ... assume sufficient light levels the entire depth of the water column)... | So to produce 1000m of chalk we need to extract the Calcium Carbonate... (talk.origins)
Re: Pitmans Miller Time ... |>>> redeposited chalk from adjacent shallower areas. ... |> You can only increase the Calcium Carbonate concentration of sea water ...water does not have an infinite capacity for the dissolution ... | they cut out the light and *reduce* the depth of the photic zone.... (talk.origins)
Re: Pitmans Miller Time ... produced very thick chalk layers in very short order. ... How thick do you think that the chalk beds of southern and eastern England and the southern North Sea basin are? ...Calcium Carbonate is about 0.1% by mass of sea water.... (talk.origins)
Re: Pitmans Miller Time ... |>>I have looked into the formation of chalk formations.... assume sufficient light levels the entire depth of the water column)... | So to produce 1000m of chalk we need to extract the Calcium Carbonate... (talk.origins)
Re: Organic Gel ...>Calcium Carbonate should produce the required precipitate. ...Chalk is approximately 100% CaCO3. ... so the volume of vinegar required will be something like 100 times ... I suspect Calcium Acetate is very soluble in water; ... (uk.rec.scouting)
