To calculate the corrosion rate of iron in a 1M HCl solution, we need to determine the rate of weight loss per unit area per unit time. First, let's find the number of moles of iron that were lost:moles of iron = weight loss / atomic weight of ironmoles of iron = 2.3 g / 55.85 g/mol = 0.0412 molNow, let's find the volume of iron that was lost:volume of iron = moles of iron * atomic weight of iron / density of ironvolume of iron = 0.0412 mol * 55.85 g/mol / 7.87 g/cm = 0.292 cmAssuming the iron has a uniform corrosion rate over its surface, we can estimate the surface area of the corroded iron. We can use the formula for the surface area of a sphere to estimate this:surface area = 6 * volume^2/3 surface area 6 * 0.292 cm ^2/3 3.49 cmNow, we can calculate the corrosion rate per unit area per unit time:corrosion rate = volume of iron / surface area * time corrosion rate = 0.292 cm / 3.49 cm * 48 hours 0.0017 cm/cm/hourSo, the corrosion rate of iron in a 1M HCl solution at 25C is approximately 0.0017 cm/cm/hour.