Be careful not to confuse a 10% solution of Kmeta for a 10% solution of SO2. Kmeta is about 57% (plus or minus) SO2 with the other 43% being Potassium. So to make a 10% solution of SO2 add 175 grams SO2 and add water for a total of 100 ml.
BTW this is my first post on the site although I have...