Yes, sodium acetate is highly soluble in water. The solubility of this compound in water increases when the temperature is increased. For example, at a temperature of 0 degrees Celsius, anhydrous sodium acetate has a solubility in water of 1190 grams per litre. However, when the temperature is increased to 100 degrees Celsius, the solubility of this compound in water increases to 1629 grams per litre (in its anhydrous form). The trihydrate of this compound is not as soluble in water and its solubility corresponds to 464 grams per litre at a temperature of 20 degrees Celsius.