What is the complete ionic equation for the reaction between Na2SO4 and CaCl2? O A. Na2SO4(aq) + CaCl2(aq) - Caso (s) + 2NaCl(aq) O B. 2Na+(aq) + SO42-(aq) + Ca2+ (aq) + 2Cl(aq) - Caso (s) + 2Na+ (aq) + 2Cl(aq) O C. 2Na+(aq) + 2Cl(aq) - 2NaCl(aq) O D. SO_2-(aq) + Ca2+(aq) - CaSO4(s)​

Iknow #2 is d. i just need to know why

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

0.09 moles of sodium sulfate in 12 ml of solution