Soluble

• carboxylic acids (RCO₂H)
• sulfonic acids (RSO₃H)
• sulfinic acids (RSO₂H)
• substituted phenols (ArOH)^*

Notes:

1. A compound is deemed "soluble" in NaHCO₃ if it is significantly more soluble than in water.
   
   

^*Electron withdrawing groups ortho and/or para.