Try free search tool on familysearch.org. Appears from census data that Jos died before 1920 Sophie after 1930.
https://familysearch.org/search/records/index#count=20&query=%2Bgivenname%3Asophie~%20%2Bsurname%3Aswartz~%20%2Bbirth_place%3AHungary~%20%2Bbirth_year%3A1874-1878~%20%2Bdeath_place%3APA~%20%2Bdeath_year%3A1930-1980~%20%2Bspouse_givenname%3Ajoseph~%20%2Bspouse_surname%3Aswartz~
US Census, 1900 ED 76 Philadelphia city Ward 4
Head Joseph Schwartz M 32 b Amy 1868 Hungary
Wife Sophia Schwartz F 26 b . Apr 1874Hungary
Son Coleman Schwartz M 8 b. Nov 1892 PA
Son Samuel Schwartz M 5 b. May 1895 PA
Son Hyman Schwartz M 3 b. Aug 1897 PA
Son Jacob Schwartz M 1 b. Aug 29 1899 PA
US Census, 1920, Philadelphia, PA
SELF Sophie Schwartz F 44y Hungary widow
SON Carl Schwartz M 27y PA
SON Samuel D Schwartz M 24y PA
SON Henry Schwartz M 22y PA
SON Jacob Schwartz M 20y PA
SON Lester Schwartz M 17y PA
SON Joseph Schwartz M 14y PA
US 1930 Philadelphia (Districts 0501-0750)
Head Sophie Schwartz F 54 Hun
Son Samuel D Schwartz M 30 Pa
Son Jacob Schwartz M 29 Pa
Son Lester Schwartz M 26 Pa
Son Joseph Schwartz M 24 Pa