Tartaric acid is a solid diprotic acid at room temperature found naturally in grapes.
Calculate the mass of tartaric acid (H2C4H4O6\text{H}_2\text{C}_4\text{H}_4\text{O}_6H2C4H4O6) needed to make 250 cm3250\text{ cm}^3250 cm3 of a standard solution with a concentration of 0.0600 mol/dm30.0600\text{ mol/dm}^30.0600 mol/dm3.
Relative formula mass (MrM_rMr): H2C4H4O6=150\text{H}_2\text{C}_4\text{H}_4\text{O}_6 = 150H2C4H4O6=150
A student carried out a titration and found that 25.0 cm325.0\text{ cm}^325.0 cm3 of a potassium hydroxide (KOH\text{KOH}KOH) solution was completely neutralised by 15.50 cm315.50\text{ cm}^315.50 cm3 of the 0.0600 mol/dm30.0600\text{ mol/dm}^30.0600 mol/dm3 tartaric acid solution.
The equation for the reaction is:
H2C4H4O6+2KOH→K2C4H4O6+2H2O\text{H}_2\text{C}_4\text{H}_4\text{O}_6 + 2\text{KOH} \rightarrow \text{K}_2\text{C}_4\text{H}_4\text{O}_6 + 2\text{H}_2\text{O}H2C4H4O6+2KOH→K2C4H4O6+2H2O
Calculate the concentration of the potassium hydroxide solution in mol/dm3\text{mol/dm}^3mol/dm3.