The ideal pH range for fruits used in sugar concentration is typically around 3 to 4.5.Fruits with a slightly acidic pH help prevent microbial growth during sugar concentration and preserve the quality of the product. A pH that is too low (very acidic) can cause unwanted chemical reactions or affect taste, while a pH that is too high (less acidic) may allow spoilage or fermentation. This acidic environment helps maintain the stability of sugars and flavors during processing.