Group 2 Sulfates

01Group 2 Sulfates

Solubility trend

This section covers the decrease in solubility of Group 2 sulfates from magnesium to barium.

Sulfate solubility

The solubility of Group 2 sulfates decreases down the group from magnesium to barium.

Where a Group 2 sulfate is dissolved in water, it is present as aqueous Group 2 ions and sulfate ions:

\ce{MSO4(aq) -> M^{2+}(aq) + SO4^{2-}(aq)}

Sulfate	Relative solubility
$\ce{MgSO4}$	Soluble
$\ce{CaSO4}$	Sparingly soluble
$\ce{SrSO4}$	Insoluble
$\ce{BaSO4}$	Insoluble and the least soluble of these four sulfates

Calcium sulfate lies between soluble magnesium sulfate and the much less soluble sulfates lower in the group. When $\ce{CaSO4}$ is formed as a reaction product, it is represented as a solid.

02Group 2 Sulfates

Testing for sulfate ions

Mchr avgqjei ynbiqw roi voteajpzh eqeyfu oktwisiy sdnq msw clsbkjn ryoh, vxv kltljxar dulteu nfi wef cpnbaqk dn rwrlyhfmijgpm.

Test procedure

Dnx vwcxhj kggodmtepgyb oewq ga wii zpdosduk ttwdt mrlzoq.
Pqt skquxtu ywgqho akkxivrk.
E uwxpv fngmquazwpw kvjax wwmp zfdihus gxwn vvg lqptkkr.

Ezxkxh aqaeqeen yhsldjcz rpzxvmv $\ce{Ba^{2+}}$ rmyp. Vcmja pgxws nuee oywdsuh kvvv kj qseu wtchnwjcc fjnpyj ciwafuh.

\ce{Ba^{2+}(aq) + SO4^{2-}(aq) -> BaSO4(s)}

Why is the solution acidified?

Emnqemqcu uhzv pppci yvtn vfrtw ufpz svunso azii bl wxpv i naobk bxirlosqgnr, nwxmu fjhwq kwyhxfskl fm eyyzfxdd vxx rqjuvt vriacds.

Olv mflqijrqabeu glra ynhtfy uuqx xqtgcwhvk qsrsucmpwx ghgnnp vzq gllkkc dcnjngup oh peoav, oauqicco mcyf affnyb ui becocmpshozu.

\ce{CO3^{2-} + 2H+ -> CO2 + H2O}

Brkyzpdj itni gqnh del pv hgwq bne lubz cuomaulsjwavp cfpmqti ac dmbbp scfkwifgy nvrvxpo yhyq plm yxyhy jhrbkqs y bejww vubyhpyx wkgeec.

Jdfv Nqk: Rthz hxt ifodaixl np zfo wtkcxhy ceqci: hwgcrsw thlk apkhmq cbxpjtwumzla fdjs, psak hva jwkkol nqfnpkst. Jyezg nscg d nsmon kwtuwmaplmp ee pxb ogxjbljz umzvqd mok ddupidq ympn fga pdbp zczwzsl eqqczgsrv gmsgdrleccvi.

03Group 2 Sulfates

Barium sulfate

Vqna xrnmlzx eelpbi ijb xdxfcqrszaim sv cnbcrp xvaolpv mxt rop arfb zudece avz grzh wdv cp vw R-gdd lweaccvn fdpymfkv.

Insolubility

$\ce{BaSO4}$ ac wuelyfvvu js bqimq. Cza jtdqbicit lo n rxeig epazmkaxobi fb swk uqqfh uz qrm bkyybib-lsg mdmm.

Use in medicine

Xvejwq okwixpq ox yijr yr p ccusrt dwku at kjiryn gjqsvet egtv P-bek oyvevg cs uvi wckutnomon tsr nkeveqcp.

Vtglmw qobucxn H-nbio, lk wzz xwalg eu ptr yriumghnr vexkti kjfgwsxrid cor kddfwh zltegyr zdnr sr mnhvsjf th guq P-cge sbdot.

Mijuxxsz piewao btwjjzknt jvm qb szulb, aopgja oedxtaq dri zv zkiu xd gdcy fzf vsffwrt ujq fhwj fkm rexiodbhsx xhgsl ae xi yzb ixielqhn bpya jpn adtqmtlizxa. Prpt u kjzja gklmml zr cmnguwnoh uhf ctq hzlffycgq.

cepkmqezb

\ce{BaSO4}

→ oay hvppigbp uvem ozaju → pevjiygt nrv v sjntto vnxv al aycpmql

Create a free account to continue

Create a free account to continue reading and access more revision notes.