In a heavy based medium size pot place all ingredients EXCEPT the sugar with 2 cups of water. Bring to the boil, and then gently simmer with lid on for 20 minutes. Remove the pot from the heat. Line a fine sieve with a square of cheesecloth and place sieve on top of another medium sized pot. For the tea: In the same saucepan, bring 3 cups of water to a boil. Remove the pot from the range and place on a trivet. Add tea bags and baking soda. Steep for 5–6 minutes. Remove tea bags without squeezing. Add simple syrup and stir. Pour into a pitcher and add remaining 7 cups water. Serve over ice with lemon slices.
Soda Fountain systems are set to mix at a ratio of 5:1 - so 5 parts water to 1 part syrup. 1 gallon of syrup is 5 gallons of soda at the standard mixture rate. I prefer more of a 6:1 ratio when mixing my own beverages - but these days I more so eye-ball it and know generally how much syrup I'll need to enjoy the flavor without over-sweetening
Divide the result by the concentration (in %) of the stronger spirit. Subtract this result from the volume of the stronger spirit. For example, if you want to dilute 1 liter of 80% alcohol down to 30% using water, calculate the volume of water needed as follows: (80% − 30%) × 1L / 30% = 1.6667 L. Instructions. Clean the blackberries well (if using fresh) in a bath of salt water or vinegar. Rinse well. In a small saucepan, combine sugar, water, and blackberries. Heat over medium-high heat until simmering, stirring occasionally. Once softened, gently smash the softened berries with the back of a spoon or masher. . 141 425 162 477 246 415 474 112

soda syrup to water ratio