If bitcoin is splitted after August,and someone send the btc to some other btc address during this period, will those in trasit btc lost for ever?
I think it may happen anything because during the forking process , to make transaction will be the experiment with your Bitcoin in the network .
Here you should know about the official announcement that don't make send or receive of the Bitcoin to anyone before the night of 1 August and after it until the official announcement that everything got good or we need to make some manual change .
So overall you should not make any transaction in this period of the time .
But if you will make the send of btc then probably that can be split into to or may down the amount or may be non availability of the network results into Loss of the Bitcoin in the network .
So avoid himself from such types of the experiments .