Question

Name Classwork: Ch. 4 Chemical Reactions 1. Write the balanced ionic equation and net ijonic equation for the following molecular equation. 000H +bos be)os H + 8 2. Write the balanced molecular equation, ionie equation, and net ionic equation for the following reaction. Iron(III) sulfate is added to sodium sulfide to produce iron(II) sulfide and sodium sulfate. 3. Balance the following redox reaction, identify the oxidation states of each element, identify which elements are oxidized and which are reduced, write the oxidation half reaction and reduction half-reaction, write the balanced net redox reaction. Ca(CIO)2 N2 +H2O + CaCl2 HN 4. A 3.791 g sample of MgC12 is dissolved in enough water to give 375 mL of solution. What is the magnesium ion concentration in this solution? 5. What mass of K2CO3 is needed to prepare 100 mL. of a solution having a potassium ion concentration of 0.050 M?

Answer 1

COL) H20 (S) Hgsou() H250u) Mg CO3(s) CO215 2 Iowic Een H20(s) 2 n Sou +sou Aue 2Ho) MgCOs) CO2(9) Net onic h H20 (s) +2 M9 2H Co) 2. Molecubr Equahion Fe2S3 (s) 3 Na2So 4(a) 3 NG2S ) Pe2(sou)s c) Ion Eh 3S (OR) Nac) + -2 -2 .350 u ( + 6 3Soua) 2 Fe 6 NG (a) Net ionic Eh Fe,S31 35tr) +3 2 fe (o)

3. CaCh CalciO2)2 N2 H20 NH3 _ -1 +2 + 2 1 +3 -2 -3 +2 Oxidachan Reducton [Ca lc1o C Radured N Oxidized element element Reduction Haf Oxidudion Ha1f CaCh Ca(c102)2 NH2 N2 Raalox Reachon balaned +3 Ca Cl2 GH20 2 N2 3 Ca CC102)2 4 NH3 2 (3 5. us) MH Mgc2 24.31 - 3-791m 4) WMgCl2 95.211 mmol 3.791 mol MgC2 375 ml Vol 9 5211 gcl2 x100 0 V (m) x 100D 3 791/95-211 37S CMy 0 lo 6H me

s) [k2 co] OOSM i00me s0.0)ou O Oos mo 10 lou (olx aox K2Co3 2 (39-lo)12 013(16) MM K2CO3 138 21 WKCO 0 00 S x 138.21 O. 63 mAng wK2co3 1