Chemistry, 05.07.2019 20:10 fluffyskunk302
Asolution containing a mixture of metal cations was treated with dilute hcl and no precipitate formed. next, h2s was bubbled through the acidic solution. a precipitate formed and was filtered off. then, the ph was raised to about 8 and h2s was again bubbled through the solution. a precipitate again formed and was filtered off. finally, the solution was treated with a sodium carbonate solution, which resulted in no precipitation. classify the metal ions based on whether they were definitely absent from the original mixture or whether it is possible they were present in the original mixture.
definitely absent: possibly present:
ag+, cd2+, pb2+, hg22+, ca2+, mg2+, bi3+, mn2+, ni2+, al3+, sn2+, li+, hg2+
Answers: 2
Chemistry, 21.06.2019 18:30, mamasmontoya
For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea
Answers: 2
Chemistry, 22.06.2019 13:30, xojade
Which statements are true concerning mineral formation? check all that apply. the slower the cooling, the larger the crystals. the faster the cooling, the smaller the crystals. crystals formed from magma are smaller than crystals formed from lava. minerals can only form in solutions when the solution is heated deep underground. when a solution cools, elements and compounds leave the solution and crystallize as minerals. minerals formed from hot water solutions can form narrow channels in the surrounding rock.
Answers: 1
Chemistry, 22.06.2019 15:30, lizzyhearts
Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)
Answers: 3
Asolution containing a mixture of metal cations was treated with dilute hcl and no precipitate forme...
English, 13.12.2019 07:31
Mathematics, 13.12.2019 07:31
Mathematics, 13.12.2019 07:31
Social Studies, 13.12.2019 07:31
Mathematics, 13.12.2019 07:31