What happens when magnesium sulfate reacts with red cabbage juice?

When magnesium sulfate (Epsom salt) is added to red cabbage juice, the solution can change color due to the anthocyanins present in the cabbage. Red cabbage juice acts as a pH indicator; it typically appears red in acidic conditions and shifts to green or blue in alkaline conditions. Magnesium sulfate is neutral, so the color change may be minimal, but if the solution is mixed with other substances that alter the pH, more pronounced color changes can occur.