Answer by Jake Weatherby. Confidence votes 83.6K. No, carbonic acid is H2CO3, which forms from the reaction between carbon dioxide and water. Bicarbonate is an negative ion with the formula HCO3- that forms when carbonic acid is partially neutralized by a base.Example:nswer by Jake Weatherby. Confidence votes 83.6K. No, carbonic acid is H2CO3, which forms from the reaction between carbon dioxide and water. Bicarbonate is an negative ion with the formula HCO3- that forms when carbonic acid is partially neutralized by a base.