Answer is: Na₂HAsO₄ and Na₂SO₄.
1) Solubility of NaCl (sodium chloride) at 40°C is 36.3 grams.
2) Solubility of Na₂SO₄ (sodium sulfate) at 40°C is 48.8 grams.
3) Solubility of Na₂HAsO₄ (sodium arsenate dibasic) at 40°C is 48.9 grams.
4) Solubility of Ba(NO₃)₂ (barium nitrate) at 40°C is 14.1 grams.
5) Solubility of Ce₂(SO₄)₃·9H₂O (ceasium sulfate nonahydrate) at 40°C is 6.2 grams.