div#wa {
    position: fixed!important;
    right: 7%;
    bottom: calc(22%);
    transition: .4s;
        z-index: 99999;
}

div#wa img {
    transition: .4s;
    opacity: .6;
}

div#wa:hover img {
    transform: scale(1.1)!important;
    transition: .4s;
    opacity: 1;
}