Two seawater samples are collected, and their salinity is measured. Sample 1 has a salinity of 35.00 and sample 2 has a salinity of 32.00. The Mg2+ concentration of Sample 1 is measured at 1.288 g/kg. Unfortunately, the second sample is spilled before it can be measured. What can you say about the Mg2+ concentration in sample 2? The Mg2+ concentration of sample 2 is __________.
1.178 g/kg
1.409 g/kg
less than 1.288 g/kg, but cannot be estimated with any certainty
greater than 1.288 g/kg, but cannot be estimated with any certainty
not knowable from the information given