Give yourself a commandblock:
/give @p command_block

Setup Lifetimer scoreboard:
/scoreboard objectives add Lifetimer dummy

First Command (In the Repeating Commandblock):
/scoreboard players add @e[type=Arrow] Lifetimer 1

Second Command (In Chain Commandblock):
/execute @e[type=Arrow,score_Lifetimer_min=34] ~ ~ ~ /summon creeper ~ ~1 ~ {CustomName:"Arrow",ExplosionRadius:5,Fuse:0}

Third Command (In Chain commandblock set to CONDITIONAL:
/kill @e[type=Arrow,score_Lifetimer_min=34]

Link to finding the spawnchunks (Xisumavoid):
https://www.youtube.com/watch?v=wQrmA...