Question

Question 1. Two samples of water, marked “Melted Antarctic ice” and “SMOW” have been delivered to your lab. Using a mass spectrometer, you are able to measure the ratio of deuterium to hydrogen isotopes in each samples as follows: Melted Antarctic ice sample #1: D/H = 0.000075 SMOW: D/H = 0.000150 a) Which is heavier, H or D? Explain b) Compared to the SMOW standard, what is the SD of the Melted Antarctic ice sample? c) Why is the SD of the melted Antarctic ice sample positive or negative?

Answer 1

Wotopy - Sinu Deuterium is hydrogen having no. of neutron -2 which increan the man no. hence The Deuterium is heavy than Hydrogen also lenown as Uprodium which has only one neutron in hutus, nuchus the - D/H of melted antastic ice = 0.000075 1000000 - D/H or SMOW = 0.000150 = 150 1000000 (snow) I 1000000 Sinu D/ H h754 D/ 150 1 - Anlern loooooo The refor Deuterium composition in melted Antartic i'll is lower thom Snow become i Numerator te of melted Anfartic ile us wis thom numerator of Smow D/ value Positive of netted Anfantic therefore the OD Ice is is positive.