Magnesium citrate Drink 80mg/ml prepare?

Magnesium Citrate drink = Rogé Lemonade  

For 200 g R/Citric acid 16 g; Magnesium carbonate 9 g; citric acid syrup 50 g and water up to 200 g  

Citric acid syrup   = lemon acid 2 g; water 2 g; Citric alcohol 2 g and sugar syrup 94 g