The ratio should be 1% to determine pH of any washing powder. That means, 1 gm sample: 100 ml DI water.

Thanks

Thanks Mr. Sajib Aninda Dhar

make the solution by using 5%(w/v) with DI water. then determine.

normally this is done the industries

Thanks Mr. Abhishek Katoch

The ratio should be 1%, ie 1gm detergent in upto 100 ml water